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Table of Contents

I

​

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

​

FORM 10-Q

​

​ | ​
☒ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
​ | THE SECURITIES EXCHANGE ACT OF 1934

​

For the quarterly period ended June 30, 2025

OR

​ | ​
☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
​ | SECURITIES EXCHANGE ACT OF 1934

​

For transition period from to

​

Commission File Number 000-10537

​

(Exact name of Registrant as specified in its charter)

​

​ | ​ | ​
Delaware | ​ | 36-3143493
(State or other jurisdiction | ​ | (I.R.S. Employer Identification Number)
of incorporation or organization) | ​ | ​

​

37 South River Street, Aurora, Illinois 60507

(Address of principal executive offices) (Zip Code)

​

(630) 892-0202

(Registrant’s telephone number, including area code)

​

Not applicable

(Former name, former address and former fiscal year, if changed since last report)

​

Securities registered pursuant to Section 12(b) of the Act:

​

Title of each class | Trading Symbol(s) | Name of each exchange on which registered
Common Stock | OSBC | The Nasdaq Stock Market

​

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☒ No ☐

​

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐

​

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of ‘‘large accelerated filer,’’ ‘‘accelerated filer,’’ ‘‘smaller reporting company,’’ and ‘‘emerging growth company’’ in Rule 12b–2 of the Exchange Act.

​

Large accelerated filer☐Accelerated filer☒

Non-accelerated filer☐Smaller reporting company☐Emerging growth company☐

​

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

​

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2).

Yes ☐ No ☒

​

As of August 5, 2025, the Registrant has 52,650,413 shares of common stock outstanding at $1.00 par value per share.

​

​

​

​

​

Table of Contents

OLD SECOND BANCORP, INC.

​

Form 10-Q Quarterly Report

​

Table of Contents

​

​

Cautionary Note Regarding Forward-Looking Statements

​

​ | ​ | ​
​ | PART I | ​
​ | ​ | Page Number
Item 1. | Financial Statements | 5
Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 43
Item 3. | Quantitative and Qualitative Disclosures about Market Risk | 67
Item 4. | Controls and Procedures | 68
​ | PART II | ​
​ | ​ | ​
Item 1. | Legal Proceedings | 69
Item 1.A. | Risk Factors | 69
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 69
Item 3. | Defaults Upon Senior Securities | 69
Item 4. | Mine Safety Disclosure | 70
Item 5. | Other Information | 70
Item 6. | Exhibits | 71
​ | ​ | ​
​ | Signatures | 72

​

​

2

Table of Contents

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

​

This report and other publicly available documents of Old Second Bancorp, Inc. (“Old Second” or the “Company”) contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act, including, but not limited to, management’s expectations regarding future plans, strategies and financial performance, regulatory developments, industry and economic trends and estimates and assumptions underlying accounting policies. Forward-looking statements also include expectations regarding the outlook and anticipated strategic and financial benefits resulting from the completed merger with Bancorp Financial, Inc. (“Bancorp Financial”). Forward-looking statements are based on our current beliefs, expectations and assumptions and on information currently available and, can be identified by the use of words such as “expects,” “intends,” “believes,” “may,” “will,” “would,” “could,” “should,” “plan,” “anticipate,” “estimate,” “possible,” “implies,” “likely” or the negative thereof as well as other similar words and expressions of the future. Forward-looking statements are subject to risks, uncertainties and assumptions that are difficult to predict as to timing, extent, likelihood and degree of occurrence, which could cause our actual results to differ materially from those anticipated in or by such statements. Potential risks and uncertainties include, but are not limited to, the following:

​

| ● | our ability to execute our growth strategy;

| ● | negative economic conditions such as inflation or tariffs that adversely affect the economy, real estate values, the job market and other factors nationally and in our market area, in each case that may affect our liquidity and the performance of our loan portfolio;

| ● | risks with respect to our ability to successfully expand and integrate businesses and operations that we acquire, as well as our ability to identify and complete future mergers or acquisitions;

| ● | the financial success and viability of the borrowers of our commercial loans;

| ● | changes in U.S. monetary policy, the level and volatility of interest rates, the capital markets and other market conditions that may affect, among other things, our liquidity and the value of our assets and liabilities;

| ● | competitive pressures from other financial service businesses and from nontraditional financial technology (“FinTech”) companies;

| ● | any negative perception of our reputation or financial strength;

| ● | our ability to raise additional capital on acceptable terms when needed;

| ● | our ability to raise cost-effective funding to support business plans when needed;

| ● | our ability to use technology to provide products and services that will satisfy customer demands and create efficiencies in operations;

| ● | adverse effects on our information technology systems resulting from system failures, human error or cyberattacks;

| ● | adverse effects of failures by our vendors to provide agreed upon services in the manner and at the cost agreed, particularly our information technology vendors and those vendors performing a service on the Company’s behalf;

| ● | the impact of any claims or legal actions, including any effect on our reputation;

| ● | losses incurred in connection with repurchases and indemnification payments related to mortgages;

| ● | the soundness of other financial institutions and other counter-party risk;

| ● | changes in accounting standards, rules and interpretations and the related impact on our financial statements;

| ● | our ability to receive dividends from our subsidiaries;

| ● | a decrease in our regulatory capital ratios or negative changes in our capital position;

| ● | adverse federal or state tax assessments, or changes in tax laws or policies;

| ● | risks associated with actual or potential litigation or investigations by customers, regulatory agencies or others;

| ● | economic, legislative or regulatory changes, including the impact of changes to Congress and the Office of the President, particularly changes in regulation of financial services companies;

| ● | increased costs of compliance, heightened regulatory capital requirements and other risks associated with changes in regulation and the current regulatory environment;

| ● | risks associated with complex and changing regulatory environments, including, among others, with respect to data privacy, artificial intelligence, information security, climate change or other environmental, social and governance matters, and labor matters, relating to our operations;

| ● | the adverse effects of events beyond our control that may have a destabilizing effect on financial markets and the economy, such as trade disputes, epidemics and pandemics, war or terrorist activities, such as the war in Ukraine, the Middle East conflict, and the conflict between China and Taiwan, essential utility outages, deterioration in the global economy, instability in the credit markets, disruptions in our customers’ supply chains or disruption in transportation and disruptions caused from widespread cybersecurity incidents;

| ● | changes in trade policy and any related tariffs;

​

​

3

Table of Contents

​

| ● | the possibility that the anticipated benefits of the merger with Bancorp Financial, Inc., which was completed July 1, 2025, including anticipated cost savings and strategic gains, are not realized when expected or at all, including as a result of the impact of, or problems arising from, the integration of the two companies or as a result of the strength of the economy, competitive factors in the areas where Old Second and Bancorp Financial do business, or as a result of other unexpected factors or events;

| ● | the impact of purchase accounting with respect to the merger with Bancorp Financial, or any change in the assumptions used regarding the assets purchased and liabilities assumed to determine their fair value;

| ● | reputational risks and potential negative reactions from customers, suppliers, employees or other business partners in response to the merger;

| ● | adverse changes in business or employee relationships resulting from the merger and its implementation;

| ● | the integration of the businesses and operations of Old Second and Bancorp Financial, which may take longer than anticipated or be more costly than anticipated or have unanticipated adverse results affecting the combined organization;

| ● | business disruptions or operational challenges that may arise following the merger with Bancorp Financial; and

| ● | each of the factors and risks under the heading “Risk Factors” in our 2024 Annual Report on Form 10-K and in subsequent filings we make with the SEC.

​

Because the Company’s ability to predict results or the actual effect of future plans or strategies is inherently uncertain, there can be no assurances that future actual results will correspond to any forward-looking statements and you should not rely on any forward-looking statements. Additionally, all statements in this Form 10-Q, including forward-looking statements, speak only as of the date they are made, and the Company undertakes no obligation to update any statement in light of new information or future events, except as required by applicable law.

​

4

Table of Contents

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

​

Old Second Bancorp, Inc. and Subsidiaries

Consolidated Balance Sheets

(In thousands, except share data)

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (unaudited) | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Assets | ​ | ​ | ​ | ​ | ​ | ​
Cash and due from banks | ​ | $ | 63,484 | ​ | $ | 52,175
Interest earning deposits with financial institutions | ​ | ​ | 78,283 | ​ | ​ | 47,154
Cash and cash equivalents | ​ | ​ | 141,767 | ​ | ​ | 99,329
Securities available-for-sale, at fair value | ​ | ​ | 1,177,688 | ​ | ​ | 1,161,701
Federal Home Loan Bank Chicago (“FHLBC”) and Federal Reserve Bank Chicago (“FRBC”) stock | ​ | ​ | 19,087 | ​ | ​ | 19,441
Loans held-for-sale | ​ | ​ | 3,235 | ​ | ​ | 1,556
Loans | ​ | ​ | 3,998,667 | ​ | ​ | 3,981,336
Less: allowance for credit losses on loans | ​ | ​ | 42,990 | ​ | ​ | 43,619
Net loans | ​ | ​ | 3,955,677 | ​ | ​ | 3,937,717
Premises and equipment, net | ​ | ​ | 85,702 | ​ | ​ | 87,311
Other real estate owned | ​ | ​ | 6,486 | ​ | ​ | 21,617
Mortgage servicing rights, at fair value | ​ | ​ | 9,680 | ​ | ​ | 10,374
Goodwill | ​ | ​ | 93,232 | ​ | ​ | 93,260
Core deposit intangible | ​ | ​ | 19,972 | ​ | ​ | 22,031
Bank-owned life insurance (“BOLI”) | ​ | ​ | 114,399 | ​ | ​ | 112,751
Deferred tax assets, net | ​ | ​ | 20,395 | ​ | ​ | 26,619
Other assets | ​ | ​ | 53,974 | ​ | ​ | 55,670
Total assets | ​ | $ | 5,701,294 | ​ | $ | 5,649,377
​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​
Deposits: | ​ | ​ | ​ | ​ | ​ | ​
Noninterest bearing demand | ​ | $ | 1,704,083 | ​ | $ | 1,704,920
Interest bearing: | ​ | ​ | ​ | ​ | ​ | ​
Savings, NOW, and money market | ​ | ​ | 2,400,235 | ​ | ​ | 2,315,134
Time | ​ | ​ | 694,121 | ​ | ​ | 748,677
Total deposits | ​ | ​ | 4,798,439 | ​ | ​ | 4,768,731
Securities sold under repurchase agreements | ​ | ​ | 47,252 | ​ | ​ | 36,657
Other short-term borrowings | ​ | ​ | - | ​ | ​ | 20,000
Junior subordinated debentures | ​ | ​ | 25,774 | ​ | ​ | 25,773
Subordinated debentures | ​ | ​ | 59,510 | ​ | ​ | 59,467
Other liabilities | ​ | ​ | 51,670 | ​ | ​ | 67,715
Total liabilities | ​ | ​ | 4,982,645 | ​ | ​ | 4,978,343
​ | ​ | ​ | ​ | ​ | ​ | ​
Stockholders’ Equity | ​ | ​ | ​ | ​ | ​ | ​
Common stock | ​ | ​ | 45,094 | ​ | ​ | 44,908
Additional paid-in capital | ​ | ​ | 206,207 | ​ | ​ | 205,284
Retained earnings | ​ | ​ | 505,419 | ​ | ​ | 469,165
Accumulated other comprehensive loss, net | ​ | ​ | (37,426) | ​ | ​ | (47,748)
Treasury stock | ​ | ​ | (645) | ​ | ​ | (575)
Total stockholders’ equity | ​ | ​ | 718,649 | ​ | ​ | 671,034
Total liabilities and stockholders’ equity | ​ | $ | 5,701,294 | ​ | $ | 5,649,377
​ | ​ | ​ | ​ | ​ | ​ | ​

​

​ | ​ | ​ | ​ | ​ | ​
​ | June 30, 2025 | ​ | December 31, 2024
​ | Common | ​ | Common
​ | Stock |  | Stock
Par value | $ | 1.00 | ​ | $ | 1.00
Shares authorized | ​ | 120,000,000 | ​ | ​ | 60,000,000
Shares issued | ​ | 45,094,412 | ​ | ​ | 44,907,619
Shares outstanding | ​ | 45,056,183 | ​ | ​ | 44,873,467
Treasury shares | ​ | 38,229 | ​ | ​ | 34,152

​

See accompanying notes to consolidated financial statements.

​

5

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Consolidated Statements of Income

(In thousands, except per share data)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (unaudited) | ​ | (unaudited)
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
Interest and dividend income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans, including fees | ​ | $ | 61,954 | ​ | $ | 62,151 | ​ | $ | 123,549 | ​ | $ | 124,824
Loans held-for-sale | ​ | ​ | 39 | ​ | ​ | 19 | ​ | ​ | 61 | ​ | ​ | 33
Securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxable | ​ | ​ | 9,959 | ​ | ​ | 8,552 | ​ | ​ | 19,186 | ​ | ​ | 16,644
Tax exempt | ​ | ​ | 1,229 | ​ | ​ | 1,292 | ​ | ​ | 2,489 | ​ | ​ | 2,598
Dividends from FHLBC and FRBC stock | ​ | ​ | 273 | ​ | ​ | 584 | ​ | ​ | 746 | ​ | ​ | 1,219
Interest bearing deposits with financial institutions | ​ | ​ | 1,784 | ​ | ​ | 625 | ​ | ​ | 2,772 | ​ | ​ | 1,235
Total interest and dividend income | ​ | ​ | 75,238 | ​ | ​ | 73,223 | ​ | ​ | 148,803 | ​ | ​ | 146,553
Interest expense | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Savings, NOW, and money market deposits | ​ | ​ | 5,606 | ​ | ​ | 4,317 | ​ | ​ | 10,519 | ​ | ​ | 8,354
Time deposits | ​ | ​ | 4,508 | ​ | ​ | 4,961 | ​ | ​ | 9,337 | ​ | ​ | 9,002
Securities sold under repurchase agreements | ​ | ​ | 56 | ​ | ​ | 83 | ​ | ​ | 124 | ​ | ​ | 169
Other short-term borrowings | ​ | ​ | - | ​ | ​ | 3,338 | ​ | ​ | 17 | ​ | ​ | 7,895
Junior subordinated debentures | ​ | ​ | 288 | ​ | ​ | 288 | ​ | ​ | 576 | ​ | ​ | 568
Subordinated debentures | ​ | ​ | 546 | ​ | ​ | 546 | ​ | ​ | 1,092 | ​ | ​ | 1,092
Total interest expense | ​ | ​ | 11,004 | ​ | ​ | 13,533 | ​ | ​ | 21,665 | ​ | ​ | 27,080
Net interest and dividend income | ​ | ​ | 64,234 | ​ | ​ | 59,690 | ​ | ​ | 127,138 | ​ | ​ | 119,473
Provision for credit losses | ​ | ​ | 2,500 | ​ | ​ | 3,750 | ​ | ​ | 4,900 | ​ | ​ | 7,250
Net interest and dividend income after provision for credit losses | ​ | ​ | 61,734 | ​ | ​ | 55,940 | ​ | ​ | 122,238 | ​ | ​ | 112,223
Noninterest income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Wealth management | ​ | ​ | 3,103 | ​ | ​ | 2,779 | ​ | ​ | 6,192 | ​ | ​ | 5,340
Service charges on deposits | ​ | ​ | 2,788 | ​ | ​ | 2,508 | ​ | ​ | 5,507 | ​ | ​ | 4,923
Secondary mortgage fees | ​ | ​ | 84 | ​ | ​ | 65 | ​ | ​ | 157 | ​ | ​ | 115
Mortgage servicing rights mark to market loss | ​ | ​ | (531) | ​ | ​ | (238) | ​ | ​ | (1,101) | ​ | ​ | (144)
Mortgage servicing income | ​ | ​ | 472 | ​ | ​ | 513 | ​ | ​ | 952 | ​ | ​ | 1,001
Net gain on sales of mortgage loans | ​ | ​ | 550 | ​ | ​ | 468 | ​ | ​ | 1,014 | ​ | ​ | 782
Securities gains, net | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1
Change in cash surrender value of BOLI | ​ | ​ | 690 | ​ | ​ | 820 | ​ | ​ | 1,188 | ​ | ​ | 1,992
Death benefit realized on BOLI | ​ | ​ | - | ​ | ​ | 893 | ​ | ​ | - | ​ | ​ | 893
Card related income | ​ | ​ | 2,716 | ​ | ​ | 2,577 | ​ | ​ | 5,128 | ​ | ​ | 4,953
Other income | ​ | ​ | 1,026 | ​ | ​ | 742 | ​ | ​ | 2,062 | ​ | ​ | 1,772
Total noninterest income | ​ | ​ | 10,898 | ​ | ​ | 11,127 | ​ | ​ | 21,099 | ​ | ​ | 21,628
Noninterest expense | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Salaries and employee benefits | ​ | ​ | 26,950 | ​ | ​ | 23,424 | ​ | ​ | 53,943 | ​ | ​ | 47,736
Occupancy, furniture and equipment | ​ | ​ | 4,477 | ​ | ​ | 3,899 | ​ | ​ | 9,025 | ​ | ​ | 7,826
Computer and data processing | ​ | ​ | 2,692 | ​ | ​ | 2,184 | ​ | ​ | 5,040 | ​ | ​ | 4,439
FDIC insurance | ​ | ​ | 642 | ​ | ​ | 616 | ​ | ​ | 1,270 | ​ | ​ | 1,283
Net teller & bill paying | ​ | ​ | 670 | ​ | ​ | 578 | ​ | ​ | 1,328 | ​ | ​ | 1,099
General bank insurance | ​ | ​ | 328 | ​ | ​ | 312 | ​ | ​ | 658 | ​ | ​ | 621
Amortization of core deposit intangible | ​ | ​ | 1,022 | ​ | ​ | 574 | ​ | ​ | 2,059 | ​ | ​ | 1,154
Advertising expense | ​ | ​ | 320 | ​ | ​ | 472 | ​ | ​ | 487 | ​ | ​ | 664
Card related expense | ​ | ​ | 1,489 | ​ | ​ | 1,323 | ​ | ​ | 2,869 | ​ | ​ | 2,600
Legal fees | ​ | ​ | 388 | ​ | ​ | 238 | ​ | ​ | 860 | ​ | ​ | 464
Consulting & management fees | ​ | ​ | 527 | ​ | ​ | 797 | ​ | ​ | 953 | ​ | ​ | 1,133
Other real estate expense, net | ​ | ​ | 35 | ​ | ​ | (87) | ​ | ​ | 1,908 | ​ | ​ | (41)
Other expense | ​ | ​ | 3,879 | ​ | ​ | 3,547 | ​ | ​ | 7,524 | ​ | ​ | 7,140
Total noninterest expense | ​ | ​ | 43,419 | ​ | ​ | 37,877 | ​ | ​ | 87,924 | ​ | ​ | 76,118
Income before income taxes | ​ | ​ | 29,213 | ​ | ​ | 29,190 | ​ | ​ | 55,413 | ​ | ​ | 57,733
Provision for income taxes | ​ | ​ | 7,391 | ​ | ​ | 7,299 | ​ | ​ | 13,761 | ​ | ​ | 14,530
Net income | ​ | $ | 21,822 | ​ | $ | 21,891 | ​ | $ | 41,652 | ​ | $ | 43,203
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic earnings per share | ​ | $ | 0.49 | ​ | $ | 0.48 | ​ | $ | 0.93 | ​ | $ | 0.96
Diluted earnings per share | ​ | ​ | 0.48 | ​ | ​ | 0.48 | ​ | ​ | 0.91 | ​ | ​ | 0.95
Dividends declared per share | ​ | ​ | 0.06 | ​ | ​ | 0.05 | ​ | ​ | 0.12 | ​ | ​ | 0.10

​

See accompanying notes to consolidated financial statements.

​

6

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Consolidated Statements of Comprehensive Income

(In thousands)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (unaudited) | ​ | (unaudited)
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
Net Income | ​ | $ | 21,822 | ​ | $ | 21,891 | ​ | $ | 41,652 | ​ | $ | 43,203
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale securities arising during the period | ​ | ​ | 5,014 | ​ | ​ | 2,405 | ​ | ​ | 13,945 | ​ | ​ | 1,529
Related tax expense | ​ | ​ | (1,403) | ​ | ​ | (673) | ​ | ​ | (3,904) | ​ | ​ | (428)
Holding gains, after tax, on available-for-sale securities | ​ | ​ | 3,611 | ​ | ​ | 1,732 | ​ | ​ | 10,041 | ​ | ​ | 1,101
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Less: Reclassification adjustment for the net gains realized during the period | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net realized gains | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1
Net realized gains, after tax | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1
Other comprehensive income on available-for-sale securities | ​ | ​ | 3,611 | ​ | ​ | 1,732 | ​ | ​ | 10,041 | ​ | ​ | 1,100
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Changes in fair value of derivatives used for cash flow hedges | ​ | ​ | 475 | ​ | ​ | 1,194 | ​ | ​ | 390 | ​ | ​ | 1,246
Related tax expense | ​ | ​ | (133) | ​ | ​ | (334) | ​ | ​ | (109) | ​ | ​ | (334)
Other comprehensive income on cash flow hedges | ​ | ​ | 342 | ​ | ​ | 860 | ​ | ​ | 281 | ​ | ​ | 912
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total other comprehensive income | ​ | ​ | 3,953 | ​ | ​ | 2,592 | ​ | ​ | 10,322 | ​ | ​ | 2,012
Total comprehensive income | ​ | $ | 25,775 | ​ | $ | 24,483 | ​ | $ | 51,974 | ​ | $ | 45,215
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Accumulated | ​ | Accumulated | ​ | Total
​ | ​ | Unrealized Gain | ​ | Unrealized Gain | ​ | Accumulated Other
​ | ​ | (Loss) on Securities | ​ | (Loss) on Derivative | ​ | Comprehensive
(unaudited) | ​ | Available-for -Sale | ​ | Instruments | ​ | Income/(Loss)
For the Three Months Ended | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, April 1, 2024 | ​ | $ | (61,222) | ​ | $ | (2,139) | ​ | $ | (63,361)
Other comprehensive income, net of tax | ​ | ​ | 1,732 | ​ | ​ | 860 | ​ | ​ | 2,592
Balance, June 30, 2024 | ​ | $ | (59,490) | ​ | $ | (1,279) | ​ | $ | (60,769)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, April 1, 2025 | ​ | $ | (42,982) | ​ | $ | 1,603 | ​ | $ | (41,379)
Other comprehensive income, net of tax | ​ | ​ | 3,611 | ​ | ​ | 342 | ​ | ​ | 3,953
Balance, June 30, 2025 | ​ | $ | (39,371) | ​ | $ | 1,945 | ​ | $ | (37,426)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
For the Six Months Ended | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, January 1, 2024 | ​ | $ | (60,590) | ​ | $ | (2,191) | ​ | $ | (62,781)
Other comprehensive income, net of tax | ​ | ​ | 1,100 | ​ | ​ | 912 | ​ | ​ | 2,012
Balance, June 30, 2024 | ​ | $ | (59,490) | ​ | $ | (1,279) | ​ | $ | (60,769)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, January 1, 2025 | ​ | $ | (49,412) | ​ | $ | 1,664 | ​ | $ | (47,748)
Other comprehensive income, net of tax | ​ | ​ | 10,041 | ​ | ​ | 281 | ​ | ​ | 10,322
Balance, June 30, 2025 | ​ | $ | (39,371) | ​ | $ | 1,945 | ​ | $ | (37,426)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

See accompanying notes to consolidated financial statements.

​

7

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

(In thousands)

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (unaudited)
​ | ​ | Six Months Ended June 30,
​ | ​ | 2025 |  | 2024
Cash flows from operating activities | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 41,652 | ​ | $ | 43,203
Adjustments to reconcile net income to net cash provided by operating activities: | ​ | ​ | ​ | ​ | ​ | ​
Net premium / discount amortization on securities | ​ | ​ | 916 | ​ | ​ | 1,544
Securities gains, net | ​ | ​ | - | ​ | ​ | (1)
Provision for credit losses | ​ | ​ | 4,900 | ​ | ​ | 7,250
Originations of loans held-for-sale | ​ | ​ | (36,371) | ​ | ​ | (22,114)
Proceeds from sales of loans held-for-sale | ​ | ​ | 35,369 | ​ | ​ | 21,650
Net gains on sales of mortgage loans | ​ | ​ | (1,014) | ​ | ​ | (782)
Mortgage servicing rights mark to market loss | ​ | ​ | 1,101 | ​ | ​ | 144
Net accretion of discount on loans and unfunded commitments | ​ | ​ | (508) | ​ | ​ | (258)
Net change in cash surrender value of BOLI | ​ | ​ | (1,188) | ​ | ​ | (1,992)
Net losses (gains) on sale of other real estate owned | ​ | ​ | 160 | ​ | ​ | (259)
Provision for other real estate owned valuation losses | ​ | ​ | 611 | ​ | ​ | -
Depreciation of fixed assets and amortization of leasehold improvements | ​ | ​ | 2,843 | ​ | ​ | 2,721
Amortization of operating lease right-of-use asset | ​ | ​ | 524 | ​ | ​ | 671
Amortization of core deposit intangibles | ​ | ​ | 2,059 | ​ | ​ | 1,154
Change in current income taxes receivable | ​ | ​ | (2,695) | ​ | ​ | (17)
Deferred tax expense | ​ | ​ | 6,224 | ​ | ​ | 2,368
Change in accrued interest receivable and other assets | ​ | ​ | (648) | ​ | ​ | 225
Accretion of purchase accounting adjustment on time deposits | ​ | ​ | (367) | ​ | ​ | (106)
Amortization of junior subordinated debentures issuance costs | ​ | ​ | 1 | ​ | ​ | -
Change in accrued interest payable and other liabilities | ​ | ​ | (13,136) | ​ | ​ | 1,998
Payments on operating lease payable | ​ | ​ | (881) | ​ | ​ | (468)
Stock based compensation | ​ | ​ | 2,531 | ​ | ​ | 2,107
Net cash provided by operating activities | ​ | ​ | 42,083 | ​ | ​ | 59,038
Cash flows from investing activities | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from maturities and calls, including pay down of securities available-for-sale | ​ | ​ | 159,559 | ​ | ​ | 171,708
Proceeds from sales of securities available-for-sale | ​ | ​ | - | ​ | ​ | 5,331
Purchases of securities available-for-sale | ​ | ​ | (162,517) | ​ | ​ | (157,886)
Net redemptions of FHLBC/FRBC stock | ​ | ​ | 354 | ​ | ​ | 1,350
Net change in loans | ​ | ​ | (27,341) | ​ | ​ | 53,983
Purchases of BOLI policies | ​ | ​ | (460) | ​ | ​ | (460)
Proceeds from claims on BOLI, net of claims receivable | ​ | ​ | - | ​ | ​ | 1,235
Proceeds from sales of other real estate owned, net of participations | ​ | ​ | 19,349 | ​ | ​ | 1,850
Net purchases of premises and equipment | ​ | ​ | (2,398) | ​ | ​ | (6,293)
Cash received from acquisition, net | ​ | ​ | 28 | ​ | ​ | -
Net cash (used in) provided by investing activities | ​ | ​ | (13,426) | ​ | ​ | 70,818
Cash flows from financing activities | ​ | ​ | ​ | ​ | ​ | ​
Net change in deposits | ​ | ​ | 30,075 | ​ | ​ | (48,912)
Net change in securities sold under repurchase agreements | ​ | ​ | 10,595 | ​ | ​ | 20,072
Net change in other short-term borrowings | ​ | ​ | (20,000) | ​ | ​ | (75,000)
Dividends paid on common stock | ​ | ​ | (5,397) | ​ | ​ | (4,478)
Purchase of treasury stock | ​ | ​ | (1,492) | ​ | ​ | (791)
Net cash provided by (used in) financing activities | ​ | ​ | 13,781 | ​ | ​ | (109,109)
Net change in cash and cash equivalents | ​ | ​ | 42,438 | ​ | ​ | 20,747
Cash and cash equivalents at beginning of period | ​ | ​ | 99,329 | ​ | ​ | 100,145
Cash and cash equivalents at end of period | ​ | $ | 141,767 | ​ | $ | 120,892
​ | ​ | ​ | ​ | ​ | ​ | ​

​

See accompanying notes to consolidated financial statements.

​

8

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Consolidated Statements of Changes in

Stockholders’ Equity

(In thousands)

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | Other | ​ | ​ | ​ | ​ | Total
(unaudited) | Common | ​ | Paid-In | ​ | Retained | ​ | Comprehensive | ​ | Treasury | ​ | Stockholders’
​ |  | Stock |  | Capital |  | Earnings |  | (Loss) Income |  | Stock |  | Equity
For the Three Months Ended | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, April 1, 2024 | ​ | $ | 44,908 | ​ | $ | 203,129 | ​ | $ | 412,388 | ​ | $ | (63,361) | ​ | $ | (905) | ​ | $ | 596,159
Net income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 21,891 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 21,891
Other comprehensive income, net of tax | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2,592 | ​ | ​ | ​ | ​ | ​ | 2,592
Dividends declared on common stock, ($0.05 per share) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (2,242) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (2,242)
Vesting of restricted stock | ​ | ​ | ​ | ​ | ​ | (67) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 67 | ​ | ​ | -
Stock based compensation | ​ | ​ | ​ | ​ | ​ | 950 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 950
Purchase of treasury stock from taxes withheld on stock awards | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (15) | ​ | ​ | (15)
Balance, June 30, 2024 | ​ | $ | 44,908 | ​ | $ | 204,012 | ​ | $ | 432,037 | ​ | $ | (60,769) | ​ | $ | (853) | ​ | $ | 619,335
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, April 1, 2025 | ​ | $ | 45,094 | ​ | $ | 205,282 | ​ | $ | 486,300 | ​ | $ | (41,379) | ​ | $ | (806) | ​ | $ | 694,491
Net income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 21,822 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 21,822
Other comprehensive income, net of tax | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 3,953 | ​ | ​ | ​ | ​ | ​ | 3,953
Dividends declared on common stock, ($0.06 per share) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (2,703) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (2,703)
Vesting of restricted stock | ​ | ​ | ​ | ​ | ​ | (223) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 223 | ​ | ​ | -
Stock based compensation | ​ | ​ | ​ | ​ | ​ | 1,148 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 1,148
Purchase of treasury stock from taxes withheld on stock awards | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (62) | ​ | ​ | (62)
Balance, June 30, 2025 | ​ | $ | 45,094 | ​ | $ | 206,207 | ​ | $ | 505,419 | ​ | $ | (37,426) | ​ | $ | (645) | ​ | $ | 718,649

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | Other | ​ | ​ | ​ | ​ | Total
​ | ​ | Common | ​ | Paid-In | ​ | Retained | ​ | Comprehensive | ​ | Treasury | ​ | Stockholders’
​ | ​ | Stock |  | Capital |  | Earnings |  | Income (Loss) |  | Stock |  | Equity
For the Six Months Ended | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, January 1, 2024 | ​ | $ | 44,705 | ​ | $ | 202,223 | ​ | $ | 393,311 | ​ | $ | (62,781) | ​ | $ | (177) | ​ | $ | 577,281
Net income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 43,203 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 43,203
Other comprehensive income, net of tax | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2,012 | ​ | ​ | ​ | ​ | ​ | 2,012
Dividends declared on common stock, ($0.10 per share) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (4,477) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (4,477)
Vesting of restricted stock | ​ | ​ | 203 | ​ | ​ | (318) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 115 | ​ | ​ | -
Stock based compensation | ​ | ​ | ​ | ​ | ​ | 2,107 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2,107
Purchase of treasury stock from taxes withheld on stock awards | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (791) | ​ | ​ | (791)
Balance, June 30, 2024 | ​ | $ | 44,908 | ​ | $ | 204,012 | ​ | $ | 432,037 | ​ | $ | (60,769) | ​ | $ | (853) | ​ | $ | 619,335
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, January 1, 2025 | ​ | $ | 44,908 | ​ | $ | 205,284 | ​ | $ | 469,165 | ​ | $ | (47,748) | ​ | $ | (575) | ​ | $ | 671,034
Net income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 41,652 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 41,652
Other comprehensive income, net of tax | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 10,322 | ​ | ​ | ​ | ​ | ​ | 10,322
Dividends declared on common stock, ($0.12 per share) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (5,398) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (5,398)
Vesting of restricted stock | ​ | ​ | 186 | ​ | ​ | (1,608) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 1,422 | ​ | ​ | -
Stock based compensation | ​ | ​ | ​ | ​ | ​ | 2,531 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2,531
Purchase of treasury stock from taxes withheld on stock awards | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (1,492) | ​ | ​ | (1,492)
Balance, June 30, 2025 | ​ | $ | 45,094 | ​ | $ | 206,207 | ​ | $ | 505,419 | ​ | $ | (37,426) | ​ | $ | (645) | ​ | $ | 718,649
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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9

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 1 – Basis of Presentation and Changes in Significant Accounting Policies

​

The accounting policies followed in the preparation of the interim consolidated financial statements are consistent with those used in the preparation of the annual financial information. The interim consolidated financial statements reflect all normal and recurring adjustments that are necessary, in the opinion of management, for a fair statement of results for the interim period presented. Results for the period ended June 30, 2025, are not necessarily indicative of the results that may be expected for the year ending December 31, 2025. These interim consolidated financial statements and accompanying notes are unaudited and should be read in conjunction with the audited financial statements and notes included in Old Second Bancorp, Inc.’s (the “Company”) annual report on Form 10-K for the year ended December 31, 2024. Unless otherwise indicated, dollar amounts in the tables contained in the notes to the consolidated financial statements are in thousands. Certain items in prior periods have been reclassified to conform to the current presentation.

​

The Company’s consolidated financial statements are prepared in accordance with United States generally accepted accounting principles (“GAAP”) and follow general practices within the banking industry. Application of these principles requires management to make estimates, assumptions, and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. These estimates, assumptions, and judgments are based on information available as of the date of the consolidated financial statements. Future changes in information may affect these estimates, assumptions, and judgments, which, in turn, may affect amounts reported in the consolidated financial statements.

​

Recent Accounting Pronouncements

​

The following is a summary of recent accounting pronouncements that have impacted or could potentially affect the Company:

​

ASU 2023-06 – On October 9, 2023, the FASB issued ASU 2023-06 “Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative.” The amendments in the ASU modify the disclosure or presentation requirements of a variety of topics in the codification. Certain of the amendments represent clarifications to, or technical corrections of, the current requirements. Each amendment in the ASU will only become effective if the SEC removes the related disclosure or presentation requirement from its existing regulations by June 30, 2027. The amendments in this ASU are not expected to have a material impact on the financial statements of the Company.

​

ASU 2023-09 – On December 14, 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”. The amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation, and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). The amendments require that all entities disclose on an annual basis the following information about income taxes paid: (1) The amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes, and (2) The amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than 5 percent of total income taxes paid (net of refunds received). The amendments also require that all entities disclose the following information: (1) Income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign, and (2) Income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The ASU is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The amendments should be applied on a prospective basis. Retrospective application is permitted. The Company is required to adopt the expanded disclosure requirements of this ASU in its annual financial statements as of December 31, 2025, and does not expect the amendments to have a material impact to the financial statements of the Company.

10

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

ASU 2024-03 and ASU 2025-01 – On November 4, 2024, the FASB issued ASU 2024-03 “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” This ASU requires public companies to disclose, in the notes to financial statements, specified information about certain costs and expenses at each interim and annual reporting period. Specifically, they will be required to: (1) Disclose the amounts of (a) purchases of inventory; (b) employee compensation; (c) depreciation; (d) intangible asset amortization; and (e) depreciation, depletion, and amortization recognized as part of oil- and gas-producing activities (or other amounts of depletion expense) included in each relevant expense caption; (2) Include certain amounts that are already required to be disclosed under current generally accepted accounting principles (GAAP) in the same disclosure as the other disaggregation requirements; (3) Disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively; and (4) Disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. ASU 2024-03 is effective for public business entities for annual reporting periods beginning after December 15, 2026, and interim reporting periods within annual reporting periods beginning after December 15, 2027, which dates were clarified in ASU 2025-01, and is not expected to have a material impact on the financial statements of the Company.

​

ASU 2025-03 – On May 12, 2025, the FASB issued ASU 2024-03 “Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity.” This ASU revises current guidance for determining the accounting acquirer for a transaction effected primarily by exchanging equity interests in which the legal acquiree is a variable interest entity that meets the definition of a business. The amendments require an entity to consider the same factors that are currently required for determining which entity is the accounting acquirer in other acquisition transactions. This ASU is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods. Early adoption is permitted in an interim or annual reporting period in which financial statements have not yet been issued (or made available for issuance). If an entity adopts ASU No. 2025-03 in an interim reporting period, it should adopt it as of the beginning of that interim reporting period or the beginning of the annual reporting period that includes that interim reporting period. An entity should apply ASU 2025-03 on a prospective basis to all business combinations that have an acquisition date that occurs on or after the date of initial application of ASU 2025-03. ASU 2025-03 is not expected to have a material impact on the financial statements of the Company.

​

Change in Significant Accounting Policies

​

Significant accounting policies are presented in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. These policies, along with the disclosures presented in the other financial statement notes and in this discussion, provide information on how significant assets and liabilities are valued in the consolidated financial statements and how those values are determined. During the second quarter of 2025, the Company had no changes to significant accounting policies or estimates.

​

Subsequent Events

​

Dividends

​

On July 15, 2025, our Board of Directors declared a cash dividend of $0.06 per share of common stock payable on August 4, 2025, to stockholders of record as of July 25, 2025; dividends of $3.2 million were paid to stockholders on August 4, 2025.

​

Merger with Bancorp Financial, Inc.

​

On July 1, 2025, the Company completed its previously announced merger with Bancorp Financial, pursuant to the agreement and plan of merger dated February 24, 2025. At the effective time of the merger, Bancorp Financial merged with and into the Company, with the Company continuing as the surviving corporation. Immediately following the merger, Evergreen Bank Group, an Illinois-chartered banking corporation and wholly owned subsidiary of Bancorp Financial, merged with and into Old Second National Bank (the “Bank”), a national banking association and wholly owned subsidiary of the Company, with the Bank continuing as the surviving bank. Under the terms of the merger agreement, each share of Bancorp Financial common stock outstanding immediately prior to the effective time was converted into the right to receive 2.5814 shares of Old Second common stock and $15.93 in cash, without interest, with cash paid in lieu of any fractional shares.

​

11

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 2 – Acquisition

​

Completed Acquisitions

​

On December 6, 2024, the Company completed its purchase of five Illinois branch locations in the southeast Chicago metropolitan statistical area from First Merchants Bank (“FRME”), the wholly owned subsidiary of First Merchants Corporation. This acquisition brought increased scale as the Company expanded its current branch network in the Chicago market. At closing, the Company recorded $24.8 million of assets, including $7.1 million of loans and $3.9 million of premises and equipment, and $268.0 million of deposits, net of fair value adjustments.

​

The Company recorded the estimate of fair value based on initial valuations available at December 6, 2024. Estimated fair values are subject to adjustment for up to one year after December 6, 2024. Based on current valuations, $13.3 million of core deposit intangible was recorded. Goodwill of $6.8 million was ultimately recorded from the branch purchase transaction. None of the $6.8 million of goodwill recorded is expected to be deductible for income tax purposes.

​

The following table provides the purchase price allocation as of the December 6, 2024, branch purchase transaction with FRME, including the assets acquired and liabilities assumed at their estimated fair values as of that date, as recorded by the Company.

​

​ | ​ | ​ | ​
First Merchants Transaction Summary
As of Date of Transaction
​ | ​ | ​ | ​
​ | ​ | December 6, 2024
Assets | ​ | ​ | ​
Cash and due from banks | ​ | $ | 419
Loans, net of purchase accounting adjustments | ​ | ​ | 7,149
Premises and equipment | ​ | ​ | 3,934
Core deposit intangible | ​ | ​ | 13,254
Other assets | ​ | ​ | 19
Total assets | ​ | $ | 24,775
​ | ​ | ​ | ​
Liabilities | ​ | ​ | ​
Noninterest bearing demand | ​ | $ | 26,497
Savings, NOW and money market | ​ | ​ | 157,126
Time | ​ | ​ | 84,344
Total deposits | ​ | ​ | 267,967
Other liabilities | ​ | ​ | 585
Total liabilities | ​ | ​ | 268,552
​ | ​ | ​ | ​
Cash consideration received | ​ | ​ | (237,023)
Total liabilities assumed and cash consideration received for transaction | ​ | $ | 31,529
Goodwill | ​ | $ | 6,754

​

Expenses related to the FRME branch transaction totaled $168,000 and $1.9 million through the six months ended June 30, 2025, and the year ended December 31, 2024, respectively. The expenses related to the transaction are reported within noninterest expense based on the line items impacted, which are primarily salaries and employee benefits, computer and data processing, legal fees, and other expense in the Consolidated Statements of Income.

​

All acquired loans are considered non-PCD as none of the loans met the definition of a purchase credit deteriorated loan.

​

12

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 3 – Securities

​

Investment Portfolio Management

​

Our investment portfolio serves the liquidity needs and income objectives of the Company. While the portfolio serves as an important component of the overall liquidity management at the Bank, portions of the portfolio also serve as income producing assets. The size and composition of the portfolio reflects liquidity needs, loan demand and interest income objectives. Portfolio size and composition will be adjusted from time to time. While a significant portion of the portfolio consists of readily marketable securities to address liquidity, other parts of the portfolio may reflect funds invested pending future loan demand or to maximize interest income without undue interest rate risk.

​

Investments are comprised of debt securities and non-marketable equity investments. Securities available-for-sale are carried at fair value. Unrealized gains and losses, net of tax, on securities available-for-sale are reported as a separate component of equity. This balance sheet component changes as interest rates and market conditions change. Unrealized gains and losses are not included in the calculation of regulatory capital.

​

Federal Home Loan Bank of Chicago (“FHLBC”) and Federal Reserve Bank of Chicago (“FRBC”) stock are considered nonmarketable equity investments. FHLBC stock was recorded at $4.2 million as of June 30, 2025, and $4.5 million as of December 31, 2024. FRBC stock was recorded at $14.9 million at June 30, 2025, and December 31, 2024. Our FHLBC stock is necessary to maintain access to FHLBC advances.

​

The following tables summarize the amortized cost and fair value of the securities portfolio at June 30, 2025, and December 31, 2024, and the corresponding amounts of gross unrealized gains and losses:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
June 30, 2025 |  | Cost1 |  | Gains |  | Losses | ​ | Value
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 188,959 | ​ | $ | 1,487 | ​ | $ | - | ​ | $ | 190,446
U.S. government agencies | ​ | ​ | 38,876 | ​ | ​ | - | ​ | ​ | (735) | ​ | ​ | 38,141
U.S. government agencies mortgage-backed | ​ | ​ | 104,995 | ​ | ​ | - | ​ | ​ | (8,912) | ​ | ​ | 96,083
States and political subdivisions | ​ | ​ | 219,682 | ​ | ​ | 169 | ​ | ​ | (11,037) | ​ | ​ | 208,814
Collateralized mortgage obligations | ​ | ​ | 429,423 | ​ | ​ | 1,134 | ​ | ​ | (35,543) | ​ | ​ | 395,014
Asset-backed securities | ​ | ​ | 49,384 | ​ | ​ | 287 | ​ | ​ | (1,552) | ​ | ​ | 48,119
Collateralized loan obligations | ​ | ​ | 201,051 | ​ | ​ | 224 | ​ | ​ | (204) | ​ | ​ | 201,071
Total securities available-for-sale | ​ | $ | 1,232,370 | ​ | $ | 3,301 | ​ | $ | (57,983) | ​ | $ | 1,177,688
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 31, 2024 |  | Cost1 |  | Gains |  | Losses | ​ | Value
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 193,902 | ​ | $ | 700 | ​ | $ | (459) | ​ | $ | 194,143
U.S. government agencies | ​ | ​ | 39,202 | ​ | ​ | - | ​ | ​ | (1,388) | ​ | ​ | 37,814
U.S. government agencies mortgage-backed | ​ | ​ | 112,241 | ​ | ​ | - | ​ | ​ | (11,964) | ​ | ​ | 100,277
States and political subdivisions | ​ | ​ | 226,969 | ​ | ​ | 264 | ​ | ​ | (11,777) | ​ | ​ | 215,456
Collateralized mortgage obligations | ​ | ​ | 411,170 | ​ | ​ | 647 | ​ | ​ | (43,201) | ​ | ​ | 368,616
Asset-backed securities | ​ | ​ | 64,215 | ​ | ​ | 69 | ​ | ​ | (1,981) | ​ | ​ | 62,303
Collateralized loan obligations | ​ | ​ | 182,629 | ​ | ​ | 472 | ​ | ​ | (9) | ​ | ​ | 183,092
Total securities available-for-sale | ​ | $ | 1,230,328 | ​ | $ | 2,152 | ​ | $ | (70,779) | ​ | $ | 1,161,701
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

1 Excludes accrued interest receivable of $7.3 million at June 30, 2025, and $7.1 million at December 31, 2024, that is recorded in other assets on the Consolidated Balance Sheets.

13

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

The fair value, amortized cost and weighted average yield of debt securities at June 30, 2025, by contractual maturity, are listed in the table below. Securities not due at a single maturity date are shown separately.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Average | ​ | ​ | Fair | ​
Securities available-for-sale |  | Cost |  | Yield | ​ |  | Value |
Due in one year or less | ​ | $ | 61,029 | ​ | 4.76 | % | ​ | $ | 61,257 | ​
Due after one year through five years | ​ | ​ | 188,914 | ​ | 3.68 | ​ | ​ | ​ | 189,400 | ​
Due after five years through ten years | ​ | ​ | 98,700 | ​ | 2.87 | ​ | ​ | ​ | 93,777 | ​
Due after ten years | ​ | ​ | 98,874 | ​ | 3.18 | ​ | ​ | ​ | 92,967 | ​
​ | ​ | ​ | 447,517 | ​ | 3.54 | ​ | ​ | ​ | 437,401 | ​
Mortgage-backed and collateralized mortgage obligations | ​ | ​ | 534,418 | ​ | 2.84 | ​ | ​ | ​ | 491,097 | ​
Asset-backed securities | ​ | ​ | 49,384 | ​ | 4.06 | ​ | ​ | ​ | 48,119 | ​
Collateralized loan obligations | ​ | ​ | 201,051 | ​ | 5.72 | ​ | ​ | ​ | 201,071 | ​
Total securities available-for-sale | ​ | $ | 1,232,370 | ​ | 3.61 | % | ​ | $ | 1,177,688 | ​

​

At June 30, 2025, the Company had no securities issued from any one originator, other than the U.S. Government and its agencies, which individually amounted to over 10% of the Company’s stockholders’ equity.

​

Securities with unrealized losses with no corresponding allowance for credit losses at June 30, 2025, and December 31, 2024, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows (in thousands except for number of securities):

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
June 30, 2025 | ​ | in an unrealized loss position | ​ | in an unrealized loss position | ​ | Total
​ | ​ | Number of | ​ | Unrealized | ​ | Fair | ​ | Number of | ​ | Unrealized | ​ | Fair | ​ | Number of | ​ | Unrealized | ​ | Fair
Securities available-for-sale |  | Securities |  | Losses |  | Value |  | Securities |  | Losses |  | Value |  | Securities |  | Losses |  | Value
U.S. Treasuries | ​ | - | ​ | $ | - | ​ | $ | - | ​ | - | ​ | $ | - | ​ | $ | - | ​ | - | ​ | $ | - | ​ | $ | -
U.S. government agencies | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | 8 | ​ | ​ | 735 | ​ | ​ | 38,141 | ​ | 8 | ​ | ​ | 735 | ​ | ​ | 38,141
U.S. government agencies mortgage-backed | ​ | 1 | ​ | ​ | 138 | ​ | ​ | 10,537 | ​ | 128 | ​ | ​ | 8,774 | ​ | ​ | 85,546 | ​ | 129 | ​ | ​ | 8,912 | ​ | ​ | 96,083
States and political subdivisions | ​ | 29 | ​ | ​ | 948 | ​ | ​ | 81,110 | ​ | 26 | ​ | ​ | 10,089 | ​ | ​ | 105,993 | ​ | 55 | ​ | ​ | 11,037 | ​ | ​ | 187,103
Collateralized mortgage obligations | ​ | 2 | ​ | ​ | 17 | ​ | ​ | 1,260 | ​ | 135 | ​ | ​ | 35,526 | ​ | ​ | 310,256 | ​ | 137 | ​ | ​ | 35,543 | ​ | ​ | 311,516
Asset-backed securities | ​ | 5 | ​ | ​ | 154 | ​ | ​ | 15,257 | ​ | 7 | ​ | ​ | 1,398 | ​ | ​ | 21,183 | ​ | 12 | ​ | ​ | 1,552 | ​ | ​ | 36,440
Collateralized loan obligations | ​ | 9 | ​ | ​ | 204 | ​ | ​ | 56,304 | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | 9 | ​ | ​ | 204 | ​ | ​ | 56,304
Total securities available-for-sale | ​ | 46 | ​ | $ | 1,461 | ​ | $ | 164,468 | ​ | 304 | ​ | $ | 56,522 | ​ | $ | 561,119 | ​ | 350 | ​ | $ | 57,983 | ​ | $ | 725,587

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024 | ​ | in an unrealized loss position | ​ | in an unrealized loss position | ​ | Total
​ | ​ | Number of | ​ | Unrealized | ​ | ​ | Fair | ​ | Number of | ​ | Unrealized | ​ | ​ | Fair | ​ | Number of | ​ | Unrealized | ​ | ​ | Fair
Securities available-for-sale |  | Securities |  | Losses |  | ​ | Value |  | Securities |  | Losses |  | ​ | Value |  | Securities |  | Losses |  | ​ | Value
U.S. Treasuries | ​ | 4 | ​ | $ | 72 | ​ | $ | 49,788 | ​ | 1 | ​ | $ | 387 | ​ | $ | 49,547 | ​ | 5 | ​ | $ | 459 | ​ | $ | 99,335
U.S. government agencies | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | 8 | ​ | ​ | 1,388 | ​ | ​ | 37,814 | ​ | 8 | ​ | ​ | 1,388 | ​ | ​ | 37,814
U.S. government agencies mortgage-backed | ​ | 1 | ​ | ​ | 447 | ​ | ​ | 10,296 | ​ | 128 | ​ | ​ | 11,517 | ​ | ​ | 89,981 | ​ | 129 | ​ | ​ | 11,964 | ​ | ​ | 100,277
States and political subdivisions | ​ | 31 | ​ | ​ | 455 | ​ | ​ | 85,457 | ​ | 27 | ​ | ​ | 11,322 | ​ | ​ | 111,308 | ​ | 58 | ​ | ​ | 11,777 | ​ | ​ | 196,765
Collateralized mortgage obligations | ​ | 3 | ​ | ​ | 24 | ​ | ​ | 5,107 | ​ | 139 | ​ | ​ | 43,177 | ​ | ​ | 328,708 | ​ | 142 | ​ | ​ | 43,201 | ​ | ​ | 333,815
Asset-backed securities | ​ | 2 | ​ | ​ | 4 | ​ | ​ | 1,068 | ​ | 13 | ​ | ​ | 1,977 | ​ | ​ | 50,198 | ​ | 15 | ​ | ​ | 1,981 | ​ | ​ | 51,266
Collateralized loan obligations | ​ | 4 | ​ | ​ | 8 | ​ | ​ | 31,440 | ​ | 1 | ​ | ​ | 1 | ​ | ​ | 227 | ​ | 5 | ​ | ​ | 9 | ​ | ​ | 31,667
Total securities available-for-sale | ​ | 45 | ​ | $ | 1,010 | ​ | $ | 183,156 | ​ | 317 | ​ | $ | 69,769 | ​ | $ | 667,783 | ​ | 362 | ​ | $ | 70,779 | ​ | $ | 850,939
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

Each quarter, we perform an analysis to determine if any of the unrealized losses on securities available-for-sale are comprised of credit losses as compared to unrealized losses due to market interest rate adjustments. Our assessment includes a review of the unrealized loss for each security issuance held; the financial condition and near-term prospects of the issuer, including external credit ratings and recent downgrades; and our ability and intent to hold the security for a period of time sufficient for a recovery in value. We also consider the extent to which the securities are issued by the federal government or its agencies, and any guarantee of issued amounts by those agencies. The portfolio continues to consist of a mix of fixed and floating-rate, high quality securities, largely rated AA (or better), displaying an overall effective duration of approximately 3.0 years. No credit losses were determined to be present as of June 30, 2025, as there was no credit quality deterioration noted. Therefore, no provision for credit losses on securities was recognized during 2025.

14

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

The following table presents net realized gains on securities available-for-sale for three months ended:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended | ​ | ​ | Six Months Ended | ​ | ​ | ​
​ | ​ | ​ | June 30, | ​ | ​ | June 30, | ​ | ​ | ​
Securities available-for-sale |  | 2025 |  | 2024 | ​ | 2025 |  | 2024 | ​ |  | ​
Proceeds from sales of securities | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | 5,331 | ​ | ​ | ​
Gross realized gains on securities | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | ​
Net realized gains | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | 1 | ​ | ​ | ​
Income tax benefit on net realized losses | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | ​ | ​
Effective tax rate applied | ​ | ​ | N/M | ​ | ​ | N/M | ​ | ​ | N/M | ​ | ​ | N/M | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

N/M – Not meaningful.

​

As of June 30, 2025, securities valued at $657.8 million were pledged for borrowings and for other purposes, a decrease from $717.5 million of securities pledged at year-end 2024.

​

Note 4 – Loans and Allowance for Credit Losses on Loans

​

Major segments of loans were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2025 |  | December 31, 2024
Commercial | ​ | $ | 718,927 | ​ | $ | 800,476
Leases | ​ | ​ | 524,513 | ​ | ​ | 491,748
Commercial real estate – investor | ​ | ​ | 1,118,782 | ​ | ​ | 1,078,829
Commercial real estate – owner occupied | ​ | ​ | 652,449 | ​ | ​ | 683,283
Construction | ​ | ​ | 251,692 | ​ | ​ | 201,716
Residential real estate – investor | ​ | ​ | 50,976 | ​ | ​ | 49,598
Residential real estate – owner occupied | ​ | ​ | 220,672 | ​ | ​ | 206,949
Multifamily | ​ | ​ | 333,787 | ​ | ​ | 351,325
HELOC | ​ | ​ | 111,265 | ​ | ​ | 103,388
Other 1 | ​ | ​ | 15,604 | ​ | ​ | 14,024
Total loans | ​ | ​ | 3,998,667 | ​ | ​ | 3,981,336
Allowance for credit losses on loans | ​ | ​ | (42,990) | ​ | ​ | (43,619)
Net loans 2 | ​ | $ | 3,955,677 | ​ | $ | 3,937,717

​

1 The “Other” segment includes consumer loans and overdrafts in this table and in subsequent tables within Note 4 – Loans and Allowance for Credit Losses on Loans.

​

2 Excludes accrued interest receivable of $17.7 million and $17.5 million at June 30, 2025, and December 31, 2024, respectively, that is recorded in other assets on the Consolidated Balance Sheets.

​

It is the policy of the Company to review each prospective credit prior to making a loan in order to determine if an adequate level of security or collateral has been obtained. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of borrower default, through adherence to lending laws, the Company’s lending standards and credit monitoring procedures. Although the Bank makes loans primarily within its market area, there are no significant concentrations of loans where the customers’ ability to honor loan terms is dependent upon a single economic sector. The real estate related categories listed above represent 68.5% and 67.2% of the portfolio at June 30, 2025, and December 31, 2024, respectively, and include a mix of owner occupied and non-owner occupied commercial real estate, residential, construction and multifamily loans.

​

15

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

The following tables represent the activity in the allowance for credit losses for loans, or the ACL, for the three and six months ended June 30, 2025 and 2024:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Provision for | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | (Release of) | ​ | ​ | ​ | ​ | ​ | Ending
Allowance for credit losses |  | Balance |  | Credit Losses 1 |  | Charge-offs |  | Recoveries |  | Balance
Three months ended June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | $ | 7,847 | ​ | $ | 431 | ​ | $ | 1,125 | ​ | $ | 32 | ​ | $ | 7,185
Leases | ​ | ​ | 2,191 | ​ | ​ | 86 | ​ | ​ | - | ​ | ​ | 3 | ​ | ​ | 2,280
Commercial real estate – investor | ​ | ​ | 15,636 | ​ | ​ | 1,272 | ​ | ​ | - | ​ | ​ | 14 | ​ | ​ | 16,922
Commercial real estate – owner occupied | ​ | ​ | 7,267 | ​ | ​ | 480 | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | 7,748
Construction | ​ | ​ | 2,669 | ​ | ​ | (127) | ​ | ​ | 13 | ​ | ​ | 350 | ​ | ​ | 2,879
Residential real estate – investor | ​ | ​ | 562 | ​ | ​ | 1 | ​ | ​ | - | ​ | ​ | 2 | ​ | ​ | 565
Residential real estate – owner occupied | ​ | ​ | 1,840 | ​ | ​ | 78 | ​ | ​ | - | ​ | ​ | 8 | ​ | ​ | 1,926
Multifamily | ​ | ​ | 1,853 | ​ | ​ | (146) | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,707
HELOC | ​ | ​ | 1,678 | ​ | ​ | 82 | ​ | ​ | - | ​ | ​ | 10 | ​ | ​ | 1,770
Other | ​ | ​ | 8 | ​ | ​ | 67 | ​ | ​ | 94 | ​ | ​ | 27 | ​ | ​ | 8
Total | ​ | $ | 41,551 | ​ | $ | 2,224 | ​ | $ | 1,232 | ​ | $ | 447 | ​ | $ | 42,990
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

1 Amount does not include the provision for unfunded commitment liability.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Provision for | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | (Release of) | ​ | ​ | ​ | ​ | ​ | Ending
Allowance for credit losses |  | Balance |  | Credit Losses |  | Charge-offs |  | Recoveries |  | Balance
Six months ended June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | $ | 7,813 | ​ | $ | 3,879 | ​ | $ | 4,571 | ​ | $ | 64 | ​ | $ | 7,185
Leases | ​ | ​ | 2,136 | ​ | ​ | 234 | ​ | ​ | 107 | ​ | ​ | 17 | ​ | ​ | 2,280
Commercial real estate – investor | ​ | ​ | 14,528 | ​ | ​ | 2,366 | ​ | ​ | - | ​ | ​ | 28 | ​ | ​ | 16,922
Commercial real estate – owner occupied | ​ | ​ | 10,036 | ​ | ​ | (2,250) | ​ | ​ | 47 | ​ | ​ | 9 | ​ | ​ | 7,748
Construction | ​ | ​ | 3,581 | ​ | ​ | (218) | ​ | ​ | 834 | ​ | ​ | 350 | ​ | ​ | 2,879
Residential real estate – investor | ​ | ​ | 553 | ​ | ​ | 8 | ​ | ​ | - | ​ | ​ | 4 | ​ | ​ | 565
Residential real estate – owner occupied | ​ | ​ | 1,509 | ​ | ​ | 379 | ​ | ​ | - | ​ | ​ | 38 | ​ | ​ | 1,926
Multifamily | ​ | ​ | 1,876 | ​ | ​ | (169) | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,707
HELOC | ​ | ​ | 1,578 | ​ | ​ | 170 | ​ | ​ | - | ​ | ​ | 22 | ​ | ​ | 1,770
Other | ​ | ​ | 9 | ​ | ​ | 110 | ​ | ​ | 202 | ​ | ​ | 91 | ​ | ​ | 8
Total | ​ | $ | 43,619 | ​ | $ | 4,509 | ​ | $ | 5,761 | ​ | $ | 623 | ​ | $ | 42,990
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

1 Amount does not include the provision for unfunded commitment liability.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Provision for | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | (Release of) | ​ | ​ | ​ | ​ | ​ | Ending
Allowance for credit losses |  | Balance |  | Credit Losses 1 |  | Charge-offs |  | Recoveries |  | Balance
Three months ended June 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | $ | 6,382 | ​ | $ | 327 | ​ | $ | 3 | ​ | $ | 22 | ​ | $ | 6,728
Leases | ​ | ​ | 2,959 | ​ | ​ | (900) | ​ | ​ | 81 | ​ | ​ | - | ​ | ​ | 1,978
Commercial real estate – investor | ​ | ​ | 16,270 | ​ | ​ | 6,132 | ​ | ​ | 4,580 | ​ | ​ | 20 | ​ | ​ | 17,842
Commercial real estate – owner occupied | ​ | ​ | 10,992 | ​ | ​ | (2,650) | ​ | ​ | 1,281 | ​ | ​ | 119 | ​ | ​ | 7,180
Construction | ​ | ​ | 1,097 | ​ | ​ | 923 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,020
Residential real estate – investor | ​ | ​ | 636 | ​ | ​ | (30) | ​ | ​ | - | ​ | ​ | 3 | ​ | ​ | 609
Residential real estate – owner occupied | ​ | ​ | 1,660 | ​ | ​ | (51) | ​ | ​ | - | ​ | ​ | 9 | ​ | ​ | 1,618
Multifamily | ​ | ​ | 2,593 | ​ | ​ | 211 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,804
HELOC | ​ | ​ | 1,508 | ​ | ​ | (40) | ​ | ​ | - | ​ | ​ | 15 | ​ | ​ | 1,483
Other | ​ | ​ | 16 | ​ | ​ | 28 | ​ | ​ | 66 | ​ | ​ | 29 | ​ | ​ | 7
Total | ​ | $ | 44,113 | ​ | $ | 3,950 | ​ | $ | 6,011 | ​ | $ | 217 | ​ | $ | 42,269

​

1 Amount does not include the provision for unfunded commitment liability.

​

​

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

16

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | Provision for | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | (Release of) | ​ | ​ | ​ | ​ | ​ | ​ | Ending
Allowance for credit losses |  | Balance |  | Credit Losses 1 |  | Charge-offs |  | Recoveries |  | ​ | Balance
Six months ended June 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | $ | 3,998 | ​ | $ | 2,653 | ​ | $ | 18 | ​ | $ | 95 | ​ | $ | 6,728
Leases | ​ | ​ | 2,952 | ​ | ​ | (933) | ​ | ​ | 81 | ​ | ​ | 40 | ​ | ​ | 1,978
Commercial real estate – investor | ​ | ​ | 17,105 | ​ | ​ | 5,230 | ​ | ​ | 4,596 | ​ | ​ | 103 | ​ | ​ | 17,842
Commercial real estate – owner occupied | ​ | ​ | 12,280 | ​ | ​ | (70) | ​ | ​ | 5,168 | ​ | ​ | 138 | ​ | ​ | 7,180
Construction | ​ | ​ | 1,038 | ​ | ​ | 982 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,020
Residential real estate – investor | ​ | ​ | 669 | ​ | ​ | (65) | ​ | ​ | - | ​ | ​ | 5 | ​ | ​ | 609
Residential real estate – owner occupied | ​ | ​ | 1,821 | ​ | ​ | (220) | ​ | ​ | - | ​ | ​ | 17 | ​ | ​ | 1,618
Multifamily | ​ | ​ | 2,728 | ​ | ​ | 76 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,804
HELOC | ​ | ​ | 1,656 | ​ | ​ | (205) | ​ | ​ | - | ​ | ​ | 32 | ​ | ​ | 1,483
Other | ​ | ​ | 17 | ​ | ​ | 46 | ​ | ​ | 136 | ​ | ​ | 80 | ​ | ​ | 7
Total | ​ | $ | 44,264 | ​ | $ | 7,494 | ​ | $ | 9,999 | ​ | $ | 510 | ​ | $ | 42,269
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

1 Amount does not include the provision for unfunded commitment liability.

​

At June 30, 2025, our allowance for credit losses (“ACL”) on loans totaled $43.0 million, and our ACL on unfunded commitments, included in other liabilities, totaled $2.3 million. During the first six months of 2025, we recorded net provision for credit losses on loans and unfunded commitments of $4.9 million based on historical loss rate updates driven by higher charge-offs in the commercial portfolio, a slight downward change to the economic forecast, and the downgrade of two of credits, which conditions resulted in an increase to the pooled reserve which was offset by the specific reserves associated with the commercial charge-offs. The ACL on loans excludes an allowance for unfunded commitments of $2.3 million as of June 30, 2025, $1.9 million as of December 31, 2024, and $2.5 million as of June 30, 2024, which is recorded within other liabilities.

​

Generally, the Bank considers a loan to be collateral dependent when, based on current information and events, it is probable that foreclosure could be initiated. Additionally, the Bank will review all loans meeting the criteria for individual analysis, to determine if repayment or satisfaction of the loan is expected through the sale of collateral. This will generally be the case for credits with high loan-to-value ratios. Exceptions to this policy would include loans with guarantors or sponsors that have the means and willingness to support the obligation. Non-accruing loans with an outstanding balance of $500,000 or more are assessed on an individual loan level basis. When a financial asset is deemed collateral-dependent, the level of credit loss is measured by the difference between amortized cost of the financial asset and the fair value of collateral adjusted for estimated cost to sell. The Company had $28.6 million and $26.2 million of collateral dependent loans secured by real estate or business assets as of June 30, 2025, and December 31, 2024, respectively.

​

17

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

The following tables present the collateral dependent loans and the related ACL allocated by segment of loans as of June 30, 2025, and December 31, 2024:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Accounts | ​ | ​ | ​ | ​ | ​ | ACL
June 30, 2025 | ​ | Real Estate | ​ | Receivable | ​ | Equipment | ​ | Total | ​ | Allocation
Commercial | ​ | $ | - | ​ | $ | 7,972 | ​ | $ | 2,677 | ​ | $ | 10,649 | ​ | $ | 1,328
Leases | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | 1,645 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,645 | ​ | ​ | 1,645
Commercial real estate – owner occupied | ​ | ​ | 14,534 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 14,534 | ​ | ​ | 2,185
Construction | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Residential real estate – investor | ​ | ​ | 27 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 27 | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | 958 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 958 | ​ | ​ | -
Multifamily | ​ | ​ | 789 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 789 | ​ | ​ | -
HELOC | ​ | ​ | 39 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 39 | ​ | ​ | -
Other | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Total | ​ | $ | 17,992 | ​ | $ | 7,972 | ​ | $ | 2,677 | ​ | $ | 28,641 | ​ | $ | 5,158
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Accounts | ​ | ​ | ​ | ​ | ​ | ACL
December 31, 2024 | ​ | Real Estate | ​ | Receivable | ​ | Equipment | ​ | Total | ​ | Allocation
Commercial | ​ | $ | - | ​ | $ | 6,491 | ​ | $ | - | ​ | $ | 6,491 | ​ | $ | 2,448
Leases | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | 1,644 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,644 | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 10,018 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 10,018 | ​ | ​ | 3,951
Construction | ​ | ​ | 5,800 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 5,800 | ​ | ​ | 792
Residential real estate – investor | ​ | ​ | 404 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 404 | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | 1,056 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,056 | ​ | ​ | -
Multifamily | ​ | ​ | 836 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 836 | ​ | ​ | -
HELOC | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Other | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Total | ​ | $ | 19,758 | ​ | $ | 6,491 | ​ | $ | - | ​ | $ | 26,249 | ​ | $ | 7,191
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

Aged analysis of past due loans by segments of loans was as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 Days or | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Greater Past
​ | ​ | 30-59 Days | ​ | 60-89 Days | ​ | Greater Past | ​ | Total Past | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Due and
June 30, 2025 | ​ | Past Due |  | Past Due |  | Due |  | Due |  | Current |  | Total Loans |  | Accruing
Commercial | ​ | $ | 1,784 | ​ | ​ | 50 | ​ | ​ | 1,731 | ​ | ​ | 3,565 | ​ | ​ | 715,362 | ​ | $ | 718,927 | ​ | $ | 345
Leases | ​ | ​ | 606 | ​ | ​ | 841 | ​ | ​ | 935 | ​ | ​ | 2,382 | ​ | ​ | 522,131 | ​ | ​ | 524,513 | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | 1,791 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,791 | ​ | ​ | 1,116,991 | ​ | ​ | 1,118,782 | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 1,206 | ​ | ​ | 5,791 | ​ | ​ | 2,236 | ​ | ​ | 9,233 | ​ | ​ | 643,216 | ​ | ​ | 652,449 | ​ | ​ | -
Construction | ​ | ​ | 179 | ​ | ​ | 525 | ​ | ​ | 344 | ​ | ​ | 1,048 | ​ | ​ | 250,644 | ​ | ​ | 251,692 | ​ | ​ | -
Residential real estate – investor | ​ | ​ | 13 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 13 | ​ | ​ | 50,963 | ​ | ​ | 50,976 | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | 280 | ​ | ​ | 2,502 | ​ | ​ | 455 | ​ | ​ | 3,237 | ​ | ​ | 217,435 | ​ | ​ | 220,672 | ​ | ​ | -
Multifamily | ​ | ​ | 125 | ​ | ​ | 287 | ​ | ​ | 192 | ​ | ​ | 604 | ​ | ​ | 333,183 | ​ | ​ | 333,787 | ​ | ​ | -
HELOC | ​ | ​ | 215 | ​ | ​ | 36 | ​ | ​ | 239 | ​ | ​ | 490 | ​ | ​ | 110,775 | ​ | ​ | 111,265 | ​ | ​ | ​
Other | ​ | ​ | 23 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 23 | ​ | ​ | 15,581 | ​ | ​ | 15,604 | ​ | ​ | -
Total | ​ | $ | 6,222 | ​ | $ | 10,032 | ​ | $ | 6,132 | ​ | $ | 22,386 | ​ | $ | 3,976,281 | ​ | $ | 3,998,667 | ​ | $ | 345

​

​

18

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 Days or | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Greater Past
​ | ​ | 30-59 Days | ​ | 60-89 Days | ​ | Greater Past | ​ | Total Past | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Due and
December 31, 2024 | ​ | Past Due |  | Past Due |  | Due |  | Due |  | Current |  | Total Loans |  | Accruing
Commercial | ​ | $ | 219 | ​ | $ | 95 | ​ | $ | 6,963 | ​ | $ | 7,277 | ​ | $ | 793,199 | ​ | $ | 800,476 | ​ | $ | 1,397
Leases | ​ | ​ | 1,438 | ​ | ​ | 372 | ​ | ​ | 352 | ​ | ​ | 2,162 | ​ | ​ | 489,586 | ​ | ​ | 491,748 | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | 2,021 | ​ | ​ | 402 | ​ | ​ | - | ​ | ​ | 2,423 | ​ | ​ | 1,076,406 | ​ | ​ | 1,078,829 | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 1,123 | ​ | ​ | 2,479 | ​ | ​ | 43 | ​ | ​ | 3,645 | ​ | ​ | 679,638 | ​ | ​ | 683,283 | ​ | ​ | -
Construction | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 5,799 | ​ | ​ | 5,799 | ​ | ​ | 195,917 | ​ | ​ | 201,716 | ​ | ​ | -
Residential real estate – investor | ​ | ​ | 763 | ​ | ​ | - | ​ | ​ | 439 | ​ | ​ | 1,202 | ​ | ​ | 48,396 | ​ | ​ | 49,598 | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | 2,489 | ​ | ​ | 90 | ​ | ​ | 509 | ​ | ​ | 3,088 | ​ | ​ | 203,861 | ​ | ​ | 206,949 | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | 233 | ​ | ​ | 1,040 | ​ | ​ | 1,273 | ​ | ​ | 350,052 | ​ | ​ | 351,325 | ​ | ​ | -
HELOC | ​ | ​ | 109 | ​ | ​ | 74 | ​ | ​ | 202 | ​ | ​ | 385 | ​ | ​ | 103,003 | ​ | ​ | 103,388 | ​ | ​ | 39
Other | ​ | ​ | 13 | ​ | ​ | 10 | ​ | ​ | - | ​ | ​ | 23 | ​ | ​ | 14,001 | ​ | ​ | 14,024 | ​ | ​ | -
Total | ​ | $ | 8,175 | ​ | $ | 3,755 | ​ | $ | 15,347 | ​ | $ | 27,277 | ​ | $ | 3,954,059 | ​ | $ | 3,981,336 | ​ | $ | 1,436

​

​

The table presents all nonaccrual loans as of June 30, 2025, and December 31, 2024:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nonaccrual loan detail |  | June 30, 2025 |  | With no ACL | ​ | December 31, 2024 |  | With no ACL
Commercial | ​ | $ | 10,775 | ​ | $ | 6,829 | ​ | $ | 5,591 | ​ | $ | 497
Leases | ​ | ​ | 1,346 | ​ | ​ | 1,346 | ​ | ​ | 523 | ​ | ​ | 523
Commercial real estate – investor | ​ | ​ | 1,645 | ​ | ​ | - | ​ | ​ | 1,981 | ​ | ​ | 1,981
Commercial real estate – owner occupied | ​ | ​ | 13,610 | ​ | ​ | 2,482 | ​ | ​ | 10,604 | ​ | ​ | 1,407
Construction | ​ | ​ | 344 | ​ | ​ | 344 | ​ | ​ | 5,800 | ​ | ​ | -
Residential real estate – investor | ​ | ​ | 704 | ​ | ​ | 704 | ​ | ​ | 1,158 | ​ | ​ | 1,158
Residential real estate – owner occupied | ​ | ​ | 1,515 | ​ | ​ | 1,515 | ​ | ​ | 1,653 | ​ | ​ | 1,653
Multifamily | ​ | ​ | 1,099 | ​ | ​ | 1,099 | ​ | ​ | 1,165 | ​ | ​ | 1,165
HELOC | ​ | ​ | 860 | ​ | ​ | 860 | ​ | ​ | 366 | ​ | ​ | 366
Other | ​ | ​ | 4 | ​ | ​ | 4 | ​ | ​ | 10 | ​ | ​ | 10
Total | ​ | $ | 31,902 | ​ | $ | 15,183 | ​ | $ | 28,851 | ​ | $ | 8,760

​

The Company recognized $15,000 and $54,000 of interest on nonaccrual loans during the three months ended and six months ended June 30, 2025, respectively, and $2,000 and $36,000 of interest on nonaccrual loans during the three months ended and six months ended June 30, 2024, respectively.

​

​

19

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Credit Quality Indicators

​

The Company categorizes loans into credit risk categories based on current financial information, overall debt service coverage, comparison to industry averages, historical payment experience, and current economic trends. This analysis includes loans with outstanding balances or commitments greater than $50,000 and excludes homogeneous loans such as home equity lines of credit and residential mortgages. Loans with a classified risk rating are reviewed quarterly regardless of size or loan type. The Company uses the following definitions for classified risk ratings:

​

Special Mention. Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan at some future date.

​

Substandard. Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. The substandard credit quality indicator includes both potential problem loans that are currently performing and nonperforming loans.

​

Doubtful. Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.

​

Credits that are not covered by the definitions above are pass credits, which are not considered to be adversely rated.

​

20

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Credit quality indicators by loan segment and loan origination date at June 30, 2025, were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted To Term Loans |  | Total
Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 91,187 | ​ | $ | 202,559 | ​ | $ | 138,762 | ​ | $ | 39,982 | ​ | $ | 12,843 | ​ | $ | 9,218 | ​ | $ | 179,524 | ​ | $ | 129 | ​ | $ | 674,204
Special Mention | ​ | ​ | - | ​ | ​ | 411 | ​ | ​ | 17,717 | ​ | ​ | 513 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,728 | ​ | ​ | - | ​ | ​ | 21,369
Substandard | ​ | ​ | - | ​ | ​ | 186 | ​ | ​ | 1,651 | ​ | ​ | 4,004 | ​ | ​ | 574 | ​ | ​ | 9 | ​ | ​ | 16,930 | ​ | ​ | - | ​ | ​ | 23,354
Total commercial | ​ | ​ | 91,187 | ​ | ​ | 203,156 | ​ | ​ | 158,130 | ​ | ​ | 44,499 | ​ | ​ | 13,417 | ​ | ​ | 9,227 | ​ | ​ | 199,182 | ​ | ​ | 129 | ​ | ​ | 718,927
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Leases | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 127,404 | ​ | ​ | 209,251 | ​ | $ | 119,224 | ​ | ​ | 44,988 | ​ | ​ | 16,727 | ​ | ​ | 4,911 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 522,505
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 575 | ​ | ​ | 87 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 662
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 352 | ​ | ​ | 994 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,346
Total leases | ​ | ​ | 127,404 | ​ | ​ | 209,251 | ​ | ​ | 119,576 | ​ | ​ | 46,557 | ​ | ​ | 16,814 | ​ | ​ | 4,911 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 524,513
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial real estate – investor | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 159,820 | ​ | ​ | 235,453 | ​ | ​ | 124,731 | ​ | ​ | 276,095 | ​ | ​ | 183,985 | ​ | ​ | 118,625 | ​ | ​ | 5,321 | ​ | ​ | - | ​ | ​ | 1,104,030
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,644 | ​ | ​ | 13,108 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 14,752
Total commercial real estate – investor | ​ | ​ | 159,820 | ​ | ​ | 235,453 | ​ | ​ | 126,375 | ​ | ​ | 289,203 | ​ | ​ | 183,985 | ​ | ​ | 118,625 | ​ | ​ | 5,321 | ​ | ​ | - | ​ | ​ | 1,118,782
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial real estate – owner occupied | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 35,593 | ​ | ​ | 73,940 | ​ | ​ | 91,005 | ​ | ​ | 124,765 | ​ | ​ | 117,658 | ​ | ​ | 125,783 | ​ | ​ | 17,822 | ​ | ​ | - | ​ | ​ | 586,566
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 12,716 | ​ | ​ | - | ​ | ​ | 1,832 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 14,548
Substandard | ​ | ​ | 65 | ​ | ​ | 2,086 | ​ | ​ | 19,232 | ​ | ​ | 1,136 | ​ | ​ | 11,056 | ​ | ​ | 17,760 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 51,335
Total commercial real estate – owner occupied | ​ | ​ | 35,658 | ​ | ​ | 76,026 | ​ | ​ | 110,237 | ​ | ​ | 138,617 | ​ | ​ | 128,714 | ​ | ​ | 145,375 | ​ | ​ | 17,822 | ​ | ​ | - | ​ | ​ | 652,449
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Construction | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 23,254 | ​ | ​ | 68,136 | ​ | ​ | 28,782 | ​ | ​ | 101,787 | ​ | ​ | 18,099 | ​ | ​ | 924 | ​ | ​ | 280 | ​ | ​ | - | ​ | ​ | 241,262
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 8,806 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 8,806
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,280 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 344 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,624
Total construction | ​ | ​ | 23,254 | ​ | ​ | 68,136 | ​ | ​ | 30,062 | ​ | ​ | 110,593 | ​ | ​ | 18,099 | ​ | ​ | 1,268 | ​ | ​ | 280 | ​ | ​ | - | ​ | ​ | 251,692
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate – investor | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 5,548 | ​ | ​ | 5,676 | ​ | ​ | 3,438 | ​ | ​ | 12,734 | ​ | ​ | 8,928 | ​ | ​ | 11,903 | ​ | ​ | 1,548 | ​ | ​ | - | ​ | ​ | 49,775
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 497 | ​ | ​ | 704 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,201
Total residential real estate – investor | ​ | ​ | 5,548 | ​ | ​ | 5,676 | ​ | ​ | 3,438 | ​ | ​ | 12,734 | ​ | ​ | 9,425 | ​ | ​ | 12,607 | ​ | ​ | 1,548 | ​ | ​ | - | ​ | ​ | 50,976
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate – owner occupied | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 24,558 | ​ | ​ | 12,864 | ​ | ​ | 28,061 | ​ | ​ | 34,807 | ​ | ​ | 31,047 | ​ | ​ | 86,721 | ​ | ​ | 907 | ​ | ​ | - | ​ | ​ | 218,965
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 102 | ​ | ​ | - | ​ | ​ | 147 | ​ | ​ | 1,458 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,707
Total residential real estate – owner occupied | ​ | ​ | 24,558 | ​ | ​ | 12,864 | ​ | ​ | 28,163 | ​ | ​ | 34,807 | ​ | ​ | 31,194 | ​ | ​ | 88,179 | ​ | ​ | 907 | ​ | ​ | - | ​ | ​ | 220,672
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Multifamily | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 24,130 | ​ | ​ | 36,716 | ​ | ​ | 54,340 | ​ | ​ | 66,027 | ​ | ​ | 85,724 | ​ | ​ | 65,554 | ​ | ​ | 197 | ​ | ​ | - | ​ | ​ | 332,688
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | 192 | ​ | ​ | - | ​ | ​ | 907 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,099
Total multifamily | ​ | ​ | 24,130 | ​ | ​ | 36,908 | ​ | ​ | 54,340 | ​ | ​ | 66,934 | ​ | ​ | 85,724 | ​ | ​ | 65,554 | ​ | ​ | 197 | ​ | ​ | - | ​ | ​ | 333,787
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
HELOC | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 1,379 | ​ | ​ | 2,433 | ​ | ​ | 2,308 | ​ | ​ | 1,853 | ​ | ​ | 325 | ​ | ​ | 4,814 | ​ | ​ | 96,973 | ​ | ​ | - | ​ | ​ | 110,085
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 238 | ​ | ​ | 941 | ​ | ​ | - | ​ | ​ | 1,180
Total HELOC | ​ | ​ | 1,379 | ​ | ​ | 2,434 | ​ | ​ | 2,308 | ​ | ​ | 1,853 | ​ | ​ | 325 | ​ | ​ | 5,052 | ​ | ​ | 97,914 | ​ | ​ | - | ​ | ​ | 111,265
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 2,730 | ​ | ​ | 4,166 | ​ | ​ | 1,162 | ​ | ​ | 1,112 | ​ | ​ | 377 | ​ | ​ | 51 | ​ | ​ | 5,984 | ​ | ​ | ​ | ​ | ​ | 15,582
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 18 | ​ | ​ | 4 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | 22
Total other | ​ | ​ | 2,730 | ​ | ​ | 4,166 | ​ | ​ | 1,180 | ​ | ​ | 1,116 | ​ | ​ | 377 | ​ | ​ | 51 | ​ | ​ | 5,984 | ​ | ​ | - | ​ | ​ | 15,604
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total loans | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 495,603 | ​ | ​ | 851,194 | ​ | ​ | 591,813 | ​ | ​ | 704,150 | ​ | ​ | 475,713 | ​ | ​ | 428,504 | ​ | ​ | 308,556 | ​ | ​ | 129 | ​ | ​ | 3,855,662
Special Mention | ​ | ​ | - | ​ | ​ | 411 | ​ | ​ | 17,717 | ​ | ​ | 22,610 | ​ | ​ | 87 | ​ | ​ | 1,832 | ​ | ​ | 2,728 | ​ | ​ | - | ​ | ​ | 45,385
Substandard | ​ | ​ | 65 | ​ | ​ | 2,465 | ​ | ​ | 24,279 | ​ | ​ | 20,153 | ​ | ​ | 12,274 | ​ | ​ | 20,513 | ​ | ​ | 17,871 | ​ | ​ | - | ​ | ​ | 97,620
Total loans | ​ | $ | 495,668 | ​ | $ | 854,070 | ​ | $ | 633,809 | ​ | $ | 746,913 | ​ | $ | 488,074 | ​ | $ | 450,849 | ​ | $ | 329,155 | ​ | $ | 129 | ​ | $ | 3,998,667

​

21

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Credit quality indicators by loan segment and loan origination date at December 31, 2024, were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted To Term Loans |  | Total
Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 299,863 | ​ | $ | 176,549 | ​ | $ | 56,619 | ​ | $ | 18,679 | ​ | $ | 4,999 | ​ | $ | 6,527 | ​ | $ | 201,514 | ​ | $ | 1,279 | ​ | $ | 766,029
Special Mention | ​ | ​ | 3,864 | ​ | ​ | 1,629 | ​ | ​ | 127 | ​ | ​ | 176 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 3,903 | ​ | ​ | - | ​ | ​ | 9,699
Substandard | ​ | ​ | - | ​ | ​ | 14 | ​ | ​ | 4,169 | ​ | ​ | 77 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 19,102 | ​ | ​ | - | ​ | ​ | 23,362
Doubtful | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,386 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,386
Total commercial | ​ | ​ | 303,727 | ​ | ​ | 178,192 | ​ | ​ | 60,915 | ​ | ​ | 20,318 | ​ | ​ | 4,999 | ​ | ​ | 6,527 | ​ | ​ | 224,519 | ​ | ​ | 1,279 | ​ | ​ | 800,476
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Leases | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 239,664 | ​ | ​ | 151,372 | ​ | $ | 66,379 | ​ | ​ | 24,546 | ​ | ​ | 6,145 | ​ | ​ | 2,298 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 490,404
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 821 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 821
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 523 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 523
Total leases | ​ | ​ | 239,664 | ​ | ​ | 151,372 | ​ | ​ | 67,723 | ​ | ​ | 24,546 | ​ | ​ | 6,145 | ​ | ​ | 2,298 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 491,748
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial real estate – investor | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 243,983 | ​ | ​ | 159,008 | ​ | ​ | 305,506 | ​ | ​ | 191,651 | ​ | ​ | 90,245 | ​ | ​ | 67,143 | ​ | ​ | 6,804 | ​ | ​ | - | ​ | ​ | 1,064,340
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | 335 | ​ | ​ | 1,645 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 12,509 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 14,489
Total commercial real estate – investor | ​ | ​ | 244,318 | ​ | ​ | 160,653 | ​ | ​ | 305,506 | ​ | ​ | 191,651 | ​ | ​ | 90,245 | ​ | ​ | 79,652 | ​ | ​ | 6,804 | ​ | ​ | - | ​ | ​ | 1,078,829
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial real estate – owner occupied | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 91,012 | ​ | ​ | 114,255 | ​ | ​ | 133,488 | ​ | ​ | 121,652 | ​ | ​ | 77,919 | ​ | ​ | 82,820 | ​ | ​ | 14,284 | ​ | ​ | - | ​ | ​ | 635,430
Special Mention | ​ | ​ | - | ​ | ​ | 1,162 | ​ | ​ | 7,908 | ​ | ​ | 7,500 | ​ | ​ | 3,033 | ​ | ​ | 631 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 20,234
Substandard | ​ | ​ | - | ​ | ​ | 125 | ​ | ​ | 1,168 | ​ | ​ | 11,241 | ​ | ​ | 9,897 | ​ | ​ | 5,188 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 27,619
Total commercial real estate – owner occupied | ​ | ​ | 91,012 | ​ | ​ | 115,542 | ​ | ​ | 142,564 | ​ | ​ | 140,393 | ​ | ​ | 90,849 | ​ | ​ | 88,639 | ​ | ​ | 14,284 | ​ | ​ | - | ​ | ​ | 683,283
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Construction | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 44,699 | ​ | ​ | 27,928 | ​ | ​ | 83,222 | ​ | ​ | 17,747 | ​ | ​ | 82 | ​ | ​ | 1,081 | ​ | ​ | 468 | ​ | ​ | - | ​ | ​ | 175,227
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 6,794 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 344 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 7,138
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 19,351 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 19,351
Total construction | ​ | ​ | 44,699 | ​ | ​ | 27,928 | ​ | ​ | 109,367 | ​ | ​ | 17,747 | ​ | ​ | 82 | ​ | ​ | 1,425 | ​ | ​ | 468 | ​ | ​ | - | ​ | ​ | 201,716
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate – investor | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 5,595 | ​ | ​ | 3,833 | ​ | ​ | 13,366 | ​ | ​ | 8,060 | ​ | ​ | 5,693 | ​ | ​ | 9,813 | ​ | ​ | 1,548 | ​ | ​ | - | ​ | ​ | 47,908
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 375 | ​ | ​ | 532 | ​ | ​ | - | ​ | ​ | 783 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,690
Total residential real estate – investor | ​ | ​ | 5,595 | ​ | ​ | 3,833 | ​ | ​ | 13,741 | ​ | ​ | 8,592 | ​ | ​ | 5,693 | ​ | ​ | 10,596 | ​ | ​ | 1,548 | ​ | ​ | - | ​ | ​ | 49,598
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate – owner occupied | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 11,609 | ​ | ​ | 29,670 | ​ | ​ | 35,786 | ​ | ​ | 32,760 | ​ | ​ | 22,996 | ​ | ​ | 71,507 | ​ | ​ | 770 | ​ | ​ | - | ​ | ​ | 205,098
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 151 | ​ | ​ | - | ​ | ​ | 1,700 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,851
Total residential real estate – owner occupied | ​ | ​ | 11,609 | ​ | ​ | 29,670 | ​ | ​ | 35,786 | ​ | ​ | 32,911 | ​ | ​ | 22,996 | ​ | ​ | 73,207 | ​ | ​ | 770 | ​ | ​ | - | ​ | ​ | 206,949
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Multifamily | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 39,133 | ​ | ​ | 68,781 | ​ | ​ | 68,032 | ​ | ​ | 100,049 | ​ | ​ | 29,060 | ​ | ​ | 44,735 | ​ | ​ | 370 | ​ | ​ | - | ​ | ​ | 350,160
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 962 | ​ | ​ | - | ​ | ​ | 203 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,165
Total multifamily | ​ | ​ | 39,133 | ​ | ​ | 68,781 | ​ | ​ | 68,994 | ​ | ​ | 100,049 | ​ | ​ | 29,263 | ​ | ​ | 44,735 | ​ | ​ | 370 | ​ | ​ | - | ​ | ​ | 351,325
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
HELOC | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 2,602 | ​ | ​ | 2,561 | ​ | ​ | 2,118 | ​ | ​ | 383 | ​ | ​ | 1,383 | ​ | ​ | 3,752 | ​ | ​ | 90,042 | ​ | ​ | - | ​ | ​ | 102,841
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 39 | ​ | ​ | 214 | ​ | ​ | 294 | ​ | ​ | - | ​ | ​ | 547
Total HELOC | ​ | ​ | 2,602 | ​ | ​ | 2,561 | ​ | ​ | 2,118 | ​ | ​ | 383 | ​ | ​ | 1,422 | ​ | ​ | 3,966 | ​ | ​ | 90,336 | ​ | ​ | - | ​ | ​ | 103,388
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 6,521 | ​ | ​ | 1,559 | ​ | ​ | 1,438 | ​ | ​ | 639 | ​ | ​ | 92 | ​ | ​ | 7 | ​ | ​ | 3,758 | ​ | ​ | ​ | ​ | ​ | 14,014
Special Mention | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | -
Substandard | ​ | ​ | - | ​ | ​ | 5 | ​ | ​ | 5 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | 10
Total other | ​ | ​ | 6,521 | ​ | ​ | 1,564 | ​ | ​ | 1,443 | ​ | ​ | 639 | ​ | ​ | 92 | ​ | ​ | 7 | ​ | ​ | 3,758 | ​ | ​ | - | ​ | ​ | 14,024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total loans | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | ​ | 984,681 | ​ | ​ | 735,516 | ​ | ​ | 765,954 | ​ | ​ | 516,166 | ​ | ​ | 238,614 | ​ | ​ | 289,683 | ​ | ​ | 319,558 | ​ | ​ | 1,279 | ​ | ​ | 3,851,451
Special Mention | ​ | ​ | 3,864 | ​ | ​ | 2,791 | ​ | ​ | 15,650 | ​ | ​ | 7,676 | ​ | ​ | 3,033 | ​ | ​ | 975 | ​ | ​ | 3,903 | ​ | ​ | - | ​ | ​ | 37,892
Substandard | ​ | ​ | 335 | ​ | ​ | 1,789 | ​ | ​ | 26,553 | ​ | ​ | 12,001 | ​ | ​ | 10,139 | ​ | ​ | 20,394 | ​ | ​ | 19,396 | ​ | ​ | - | ​ | ​ | 90,607
Doubtful | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,386 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 1,386
Total loans | ​ | $ | 988,880 | ​ | $ | 740,096 | ​ | $ | 808,157 | ​ | $ | 537,229 | ​ | $ | 251,786 | ​ | $ | 311,052 | ​ | $ | 342,857 | ​ | $ | 1,279 | ​ | $ | 3,981,336

​

22

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

The gross charge-offs activity by loan type and year of origination for the six months ended June 30, 2025 and 2024, were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2025 |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Total
Commercial | ​ | $ | - | ​ | $ | 76 | ​ | $ | 3,102 | ​ | $ | - | ​ | $ | 1,386 | ​ | $ | 7 | ​ | $ | 4,571
Leases | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 85 | ​ | ​ | 22 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 107
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 47 | ​ | ​ | 47
Construction | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 834 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 834
Residential real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
HELOC | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Other | ​ | ​ | - | ​ | ​ | 5 | ​ | ​ | 7 | ​ | ​ | - | ​ | ​ | 4 | ​ | ​ | 186 | ​ | ​ | 202
Total | ​ | $ | - | ​ | $ | 81 | ​ | $ | 3,194 | ​ | $ | 856 | ​ | $ | 1,390 | ​ | $ | 240 | ​ | $ | 5,761

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2024 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Total
Commercial | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | 18 | ​ | $ | 18
Leases | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 28 | ​ | ​ | 53 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 81
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 4,128 | ​ | ​ | 452 | ​ | ​ | 16 | ​ | ​ | - | ​ | ​ | 4,596
Commercial real estate – owner occupied | ​ | ​ | - | ​ | ​ | ​ | ​ | ​ | - | ​ | ​ | 5,135 | ​ | ​ | - | ​ | ​ | 33 | ​ | ​ | 5,168
Construction | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Residential real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Residential real estate – owner occupied | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
HELOC | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Other | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 136 | ​ | ​ | 136
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 4,156 | ​ | $ | 5,640 | ​ | $ | 16 | ​ | $ | 187 | ​ | $ | 9,999

​

The Company had $387,000 and $469,000 in residential real estate loans in the process of foreclosure as of June 30, 2025, and December 31, 2024, respectively.

​

There were 22 loans modified during the six-month period ending June 30, 2025, totaling $57.0 million in aggregate, which were experiencing financial difficulty. Of the 22 loans modified in the first six months of 2025, 13 loans had also been modified in prior periods. There were six loans modified during the six-month period ending June 30, 2024, totaling $16.4 million in aggregate, which were experiencing financial difficulty. There were no modified loans that experienced a payment default in the 12 months subsequent to their modification during the 12 months ending June 30, 2025 and 2024.

​

The following tables present the amortized costs basis of loans at June 30, 2025, and June 30, 2024, that were both experiencing financial difficulty and modified during the six months ended June 30, 2025, and June 30, 2024, by class and by type of modification. The percentage of the amortized cost basis of loans that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of financing receivable is also presented below.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three months ended June 30, 2025 | ​ | Term Extension | ​ | Combination - Term Extension, Interest Rate Modification, Payment Modification, and Principal Reduction | ​ | Combination - Term Extension and Interest Rate Modification | ​ | Combination - Term Extension and Payment Modification 1 | ​ | Total Loans Modified | ​ | % of Total Loan Segment Modified to Total Loan Segment | ​
Commercial | ​ | $ | 5,447 | ​ | $ | - | ​ | $ | - | ​ | $ | 6,357 | ​ | $ | 11,804 | ​ | 1.6 | %
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | - | ​
Commercial real estate – owner occupied | ​ | ​ | 12,119 | ​ | ​ | - | ​ | ​ | 300 | ​ | ​ | 3,221 | ​ | ​ | 15,640 | ​ | 2.4 | ​
Multifamily | ​ | ​ | 192 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 192 | ​ | 0.1 | ​
Total | ​ | $ | 17,758 | ​ | $ | - | ​ | $ | 300 | ​ | $ | 9,578 | ​ | $ | 27,636 | ​ | 0.7 | %

1 Payment modifications are either contractual delays in payment or a modification of the payment amount.

​

​

23

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2025 | ​ | Term Extension | ​ | Combination - Term Extension, Interest Rate Modification, Payment Modification, and Principal Reduction | ​ | Combination - Term Extension and Interest Rate Modification | ​ | Combination - Term Extension and Payment Modification 1 | ​ | Total Modifications | ​ | % of Total Loan Segment Modified to Total Loan Segment | ​
Commercial | ​ | $ | 5,447 | ​ | $ | - | ​ | $ | - | ​ | $ | 6,357 | ​ | $ | 11,804 | ​ | 1.6 | %
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 12,311 | ​ | ​ | 13,107 | ​ | ​ | 25,418 | ​ | 2.3 | ​
Commercial real estate – owner occupied | ​ | ​ | 16,050 | ​ | ​ | - | ​ | ​ | 300 | ​ | ​ | 3,221 | ​ | ​ | 19,571 | ​ | 3.0 | ​
Multifamily | ​ | ​ | 192 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 192 | ​ | 0.1 | ​
Total | ​ | $ | 21,689 | ​ | $ | - | ​ | $ | 12,611 | ​ | $ | 22,685 | ​ | $ | 56,985 | ​ | 1.4 | %

​

​

1 Payment modifications are either contractual delays in payment or a modification of the payment amount.

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three months ended June 30, 2024 | ​ | Term Extension | ​ | Combination - Term Extension, Interest Rate Modification, Payment Modification, and Principal Reduction | ​ | Combination - Term Extension and Interest Rate Modification | ​ | Combination - Term Extension and Payment Modification 1 | ​ | Total Loans Modified | ​ | % of Total Loan Segment Modified to Total Loan Segment | ​
Commercial | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | - | %
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | - | ​
Commercial real estate – owner occupied | ​ | ​ | - | ​ | ​ | 491 | ​ | ​ | - | ​ | ​ | 212 | ​ | ​ | 703 | ​ | 0.1 | ​
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | - | ​
Total | ​ | $ | - | ​ | $ | 491 | ​ | $ | - | ​ | $ | 212 | ​ | $ | 703 | ​ | 0.0 | %

​

1 Payment modifications are either contractual delays in payment or a modification of the payment amount.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2024 | ​ | Term Extension | ​ | Combination - Term Extension, Interest Rate Modification, Payment Modification, and Principal Reduction | ​ | Combination - Term Extension and Interest Rate Modification | ​ | Combination - Term Extension and Payment Modification 1 | ​ | Total Loans Modified | ​ | % of Total Loan Segment Modified to Total Loan Segment | ​
Commercial | ​ | $ | 247 | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | 247 | ​ | - | %
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | - | ​
Commercial real estate – owner occupied | ​ | ​ | 12,156 | ​ | ​ | 491 | ​ | ​ | 3,269 | ​ | ​ | 212 | ​ | ​ | 16,128 | ​ | 2.2 | ​
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | - | ​
Total | ​ | $ | 12,403 | ​ | $ | 491 | ​ | $ | 3,269 | ​ | $ | 212 | ​ | $ | 16,375 | ​ | 0.4 | %

​

1 Payment modifications are either contractual delays in payment or a modification of the payment amount.

​

The Company closely monitors the performance of loan modifications to borrowers experiencing financial difficulty. The following tables present the performance of loans that have been modified in the last twelve months as of June 30, 2025, and June 30, 2024.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
June 30, 2025 | ​ | 30-59 days past due | ​ | 60-89 Days Past Due | ​ | 90 Days or Greater Past Due | ​ | Total Past Due | ​ | Current | ​ | Total Modifications
Commercial | ​ | $ | 1,609 | ​ | $ | - | ​ | $ | - | ​ | $ | 1,609 | ​ | $ | 10,195 | ​ | $ | 11,804
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 28,453 | ​ | ​ | 28,453
Commercial real estate – owner occupied | ​ | ​ | 300 | ​ | ​ | 3,806 | ​ | ​ | 2,151 | ​ | ​ | 6,257 | ​ | ​ | 13,314 | ​ | ​ | 19,571
Residential real estate – owner occupied | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 192 | ​ | ​ | 192 | ​ | ​ | 1,184 | ​ | ​ | 1,376
HELOC | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Total | ​ | $ | 1,909 | ​ | $ | 3,806 | ​ | $ | 2,343 | ​ | $ | 8,058 | ​ | $ | 53,146 | ​ | $ | 61,204

​

​

24

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
June 30, 2024 | ​ | 30-59 days past due | ​ | 60-89 Days Past Due | ​ | 90 Days or Greater Past Due | ​ | Total Past Due | ​ | Current | ​ | Total Modifications
Commercial | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | 1,708 | ​ | $ | 1,708
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 7,473 | ​ | ​ | 7,473
Commercial real estate – owner occupied | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 3,443 | ​ | ​ | 3,443 | ​ | ​ | 16,127 | ​ | ​ | 19,570
Residential real estate – owner occupied | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 114 | ​ | ​ | 114
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 214 | ​ | ​ | 214 | ​ | ​ | - | ​ | ​ | 214
HELOC | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 88 | ​ | ​ | 88
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 3,657 | ​ | $ | 3,657 | ​ | $ | 25,510 | ​ | $ | 29,167

​

The following tables summarize the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the six months ended June 30, 2025, and June 30, 2024. The Company had 11 loans that had a payment modification as of June 30, 2025. One loan had an increase of monthly payment until maturity, one relationship with four loans between commercial and commercial real estate - owner occupied had a payment deferment of two months on each loan, and one loan is interest payments only until maturity. The financial impact of these modifications to the Company was immaterial. As of June 30, 2024, there were two loans that had a payment modification. One loan had an increase of monthly payment until maturity and the other loan had a reduction of monthly payment until maturity. The financial impact of these modifications was immaterial.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three months ended June 30, 2025 | ​ | Weighted-Average Term Extension (In Months) | ​ | Weighted-Average Interest Rate Change | ​ | Weighted-Average Delay of Payment (In Months)
Commercial | ​ | ​ | 4.84 | ​ | ​ | - | % | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 6.21 | ​ | ​ | 0.82 | ​ | ​ | ​ | -
Multifamily | ​ | ​ | 6.00 | ​ | ​ | - | ​ | ​ | ​ | -
Total | ​ | ​ | 5.62 | ​ | ​ | 0.82 | % | ​ | ​ | -

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2025 | ​ | Weighted-Average Term Extension (In Months) | ​ | Weighted-Average Interest Rate Change | ​ | Weighted-Average Delay of Payment (In Months)
Commercial | ​ | ​ | 4.84 | ​ | ​ | - | % | ​ | ​ | 2.00
Commercial real estate – investor | ​ | ​ | 9.00 | ​ | ​ | (1.00) | ​ | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 5.89 | ​ | ​ | 0.82 | ​ | ​ | ​ | 2.00
Multifamily | ​ | ​ | 6.00 | ​ | ​ | - | ​ | ​ | ​ | -
Total | ​ | ​ | 7.06 | ​ | ​ | (0.96) | % | ​ | ​ | 2.00

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three months ended June 30, 2024 | ​ | Weighted-Average Term Extension (In Months) | ​ | Weighted-Average Interest Rate Change | ​ | Weighted-Average Delay of Payment (In Months)
Commercial | ​ | ​ | - | ​ | ​ | - | % | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 25.07 | ​ | ​ | 0.15 | ​ | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | -
Total | ​ | ​ | 25.07 | ​ | ​ | 0.15 | % | ​ | ​ | -

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six months ended June 30, 2024 | ​ | Weighted-Average Term Extension (In Months) | ​ | Weighted-Average Interest Rate Change | ​ | Weighted-Average Delay of Payment (In Months)
Commercial | ​ | ​ | 4.00 | ​ | ​ | - | % | ​ | ​ | -
Commercial real estate – investor | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | -
Commercial real estate – owner occupied | ​ | ​ | 5.12 | ​ | ​ | 0.33 | ​ | ​ | ​ | -
Multifamily | ​ | ​ | - | ​ | ​ | - | ​ | ​ | ​ | -
Total | ​ | ​ | 5.10 | ​ | ​ | 0.33 | % | ​ | ​ | -

​

​

​

25

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 5 – Other Real Estate Owned

​

Details related to the activity in the other real estate owned (“OREO”) portfolio, net of valuation reserve, for the periods presented are itemized in the following table:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ |  | June 30, |  | June 30,
Other real estate owned |  | 2025 |  | 2024 |  | 2025 | ​ | 2024
Balance at beginning of period | ​ | $ | 2,878 | ​ | $ | 5,123 | ​ | $ | 21,617 | ​ | $ | 5,123
Property additions, net of participation sold | ​ | ​ | 4,989 | ​ | ​ | 3,388 | ​ | ​ | 4,989 | ​ | ​ | 3,388
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Carrying value of property disposals, net of participation sold | ​ | ​ | 1,224 | ​ | ​ | 1,591 | ​ | ​ | 19,509 | ​ | ​ | 1,591
Period valuation adjustments | ​ | ​ | 157 | ​ | ​ | - | ​ | ​ | 611 | ​ | ​ | ​
Balance at end of period | ​ | $ | 6,486 | ​ | $ | 6,920 | ​ | $ | 6,486 | ​ | $ | 6,920

​

Activity in the valuation allowance was as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Six Months Ended
​ |  | June 30, |  | June 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
Balance at beginning of period | ​ | $ | 853 | ​ | $ | 118 | ​ | $ | 1,862 | ​ | $ | 118
Provision for valuation reserves | ​ | ​ | 157 | ​ | ​ | - | ​ | ​ | 611 | ​ | ​ | -
Reductions taken on sales | ​ | ​ | (448) | ​ | ​ | - | ​ | ​ | (1,911) | ​ | ​ | -
Balance at end of period | ​ | $ | 562 | ​ | $ | 118 | ​ | $ | 562 | ​ | $ | 118
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

Expenses related to OREO, net of lease revenue, includes:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, |  | June 30,
​ |  | 2025 |  | 2024 |  | 2025 | ​ | 2024
(Gain) Loss on sales, net | ​ | $ | (76) | ​ | $ | (259) | ​ | $ | 160 | ​ | $ | (259)
Provision for valuation reserves | ​ | ​ | 157 | ​ | ​ | - | ​ | ​ | 611 | ​ | ​ | -
Operating expenses | ​ | ​ | (393) | ​ | ​ | 239 | ​ | ​ | 1,520 | ​ | ​ | 352
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease revenue | ​ | ​ | (347) | ​ | ​ | 67 | ​ | ​ | 383 | ​ | ​ | 134
Net OREO expense | ​ | $ | 35 | ​ | $ | (87) | ​ | $ | 1,908 | ​ | $ | (41)

​

​

​

Note 6 – Deposits

​

Major classifications of deposits were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2025 |  | December 31, 2024 |
Noninterest bearing demand | ​ | $ | 1,704,083 | ​ | $ | 1,704,920 | ​
Savings | ​ | ​ | 929,424 | ​ | ​ | 932,201 | ​
NOW accounts | ​ | ​ | 640,607 | ​ | ​ | 621,434 | ​
Money market accounts | ​ | ​ | 830,204 | ​ | ​ | 761,499 | ​
Certificates of deposit of less than $100,000 | ​ | ​ | 324,571 | ​ | ​ | 352,526 | ​
Certificates of deposit of $100,000 through $250,000 | ​ | ​ | 241,774 | ​ | ​ | 270,837 | ​
Certificates of deposit of more than $250,000 | ​ | ​ | 127,776 | ​ | ​ | 125,314 | ​
Total deposits | ​ | $ | 4,798,439 | ​ | $ | 4,768,731 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

26

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Note 7 – Borrowings

​

The following table is a summary of borrowings as of June 30, 2025, and December 31, 2024. Junior subordinated debentures are discussed in more detail in Note 8.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2025 |  | December 31, 2024 |
Securities sold under repurchase agreements | ​ | $ | 47,252 | ​ | $ | 36,657 | ​
Other short-term borrowings | ​ | ​ | - | ​ | ​ | 20,000 | ​
Junior subordinated debentures1 | ​ | ​ | 25,774 | ​ | ​ | 25,773 | ​
Subordinated debentures | ​ | ​ | 59,510 | ​ | ​ | 59,467 | ​
Total borrowings | ​ | $ | 132,536 | ​ | $ | 141,897 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

1 See Note 8 - Junior Subordinated Debentures.

​

The Company enters into deposit sweep transactions where the transaction amounts are secured by pledged securities. These transactions consistently mature overnight from the transaction date and are governed by sweep repurchase agreements. All sweep repurchase agreements are treated as financings secured by U.S. government agencies and collateralized mortgage-backed securities, and had a carrying amount of $47.3 million at June 30, 2025, and $36.7 million at December 31, 2024. The fair value of the pledged collateral was $73.7 million at June 30, 2025, and $73.6 million at December 31, 2024. At June 30, 2025, there were no customers with secured balances exceeding 10% of stockholders’ equity.

​

The Company’s borrowings at the FHLBC require the Bank to be a member and invest in the stock of the FHLBC. Total borrowings are generally limited to the lower of 35% of total assets or 60% of the book value of certain mortgage loans. There were no outstanding short-term FHLBC advances as of June 30, 2025, and the outstanding balance of our short-term FHLBC borrowings was $20.0 million as of December 31, 2024. FHLBC stock held at June 30, 2025, was valued at $4.2 million, and any potential FHLBC advances were collateralized by loans and securities with a principal balance of $1.33 billion, which provided the Company with $863.5 million of available, unused borrowing capacity.

​

In the second quarter of 2021, we issued $60.0 million in aggregate principal amount of our 3.50% Fixed-to-Floating Rate Subordinated Notes due April 15, 2031 (the “Notes”). The Company used the net proceeds from the offering for general corporate purposes. The Notes bear interest at a fixed annual rate of 3.50%, from and including the date of issuance to but excluding April 15, 2026, payable semi-annually in arrears. From and including April 15, 2026, to, but excluding the maturity date or early redemption date, the interest rate will reset quarterly to an interest rate per annum equal to three-month Term Secured Overnight Financing Rate (“SOFR”) (as defined by the Note) plus 273 basis points, payable quarterly in arrears. As of June 30, 2025, and December 31, 2024, we had $59.5 million of subordinated debentures outstanding, net of deferred issuance cost.

​

The Company also has an undrawn line of credit of $30.0 million with a correspondent bank to be used for short-term funding needs; advances under this line can be outstanding up to 360 days from the date of issuance. This line of credit has not been utilized since early 2019.

​

Note 8 – Junior Subordinated Debentures

​

The Company issued $25.0 million of cumulative trust preferred securities through a private placement completed by an unconsolidated subsidiary, Old Second Capital Trust II, in April 2007. These trust preferred securities mature in 30 years, but subject to regulatory approval, can be called in whole or in part on a quarterly basis commencing June 15, 2017. The quarterly cash distributions on the securities were fixed at 6.77% through June 15, 2017, and now have a floating rate of 150 basis points over three-month SOFR. Upon conversion to a floating rate, a cash flow hedge was initiated which resulted in the total interest rate paid on the debt of 4.48% for the quarter ended June 30, 2025, and 4.49% for the quarter ended June 30, 2024. The Company issued a $25.8 million subordinated debenture to Old Second Capital Trust II in return for the aggregate net proceeds of this trust preferred offering. The interest rate and payment frequency on the debenture are equivalent to the cash distribution basis on the trust preferred securities.

​

​

27

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

The junior subordinated debentures issued by the Company are disclosed on the Consolidated Balance Sheets, and the related interest expense for each issuance is included in the Consolidated Statements of Income. As of June 30, 2025, and December 31, 2024, the remaining unamortized debt issuance costs related to the junior subordinated debentures were less than $1,000 and are included as a reduction to the balance of the junior subordinated debentures on the Consolidated Balance Sheets. The remaining deferred issuance costs on the junior subordinated debentures related to the issuance of Old Second Capital Trust II will be amortized to interest expense over the remainder of the 30-year term of the notes and are included in the Consolidated Statements of Income.

​

Note 9 – Equity Compensation Plans

​

Stock-based awards are outstanding under the Company’s 2019 Equity Incentive Plan, as amended and restated (the “2019 Plan”). The 2019 Plan was originally approved at the May 2019 annual stockholders’ meeting and authorized 600,000 shares, and at the May 2021 annual stockholders’ meeting, the Company obtained stockholder approval to increase the number of shares of common stock authorized for issuance under the 2019 Plan by 1,200,000 shares, from 600,000 shares to 1,800,000 shares. At the May 2025 annual stockholders’ meeting, the Company obtained stockholder approval to increase the number of shares of common stock authorized for issuance under the 2019 Plan by an additional 800,000 shares, from 1,800,000 shares to 2,600,000 shares. Following the approval of the 2019 Plan, no further awards will be granted under any other prior plan.

​

The 2019 Plan authorizes the granting of qualified stock options, non-qualified stock options, restricted stock, restricted stock units, and stock appreciation rights (“SARs”), to date only restricted stock units have been awarded. Awards may be granted to selected directors, officers, employees or eligible service providers under the 2019 Plan at the discretion of the Compensation Committee of the Company’s Board of Directors. As of June 30, 2025, 1,358,436 shares remained available for issuance under the 2019 Plan. The Company has granted only restricted stock units under the 2019 Equity Plan.

​

Generally, restricted stock units granted under the 2019 Plan vest three years from the grant date, but the Compensation Committee of the Company’s Board of Directors has discretionary authority to change the terms of particular awards including the vesting schedule.

​

Under the 2019 Plan, unless otherwise provided in an award agreement, upon the occurrence of a change in control, all equity awards then held by the participant will become fully exercisable immediately if, and all stock awards and cash incentive awards will become fully earned and vested immediately if, (i) the 2019 Plan is not an obligation of the successor entity following a change in control or (ii) the 2019 Plan is an obligation of the successor entity following a change in control and the participant incurs a termination of service without cause or for good reason following the change in control. Notwithstanding the immediately preceding sentence, if the vesting of an award is conditioned upon the achievement of performance measures, then such vesting will generally be subject to the following: if, at the time of the change in control, the performance measures are less than 50% attained (pro rata based upon the time of the period through the change in control), the award will become vested and exercisable on a fractional basis with the numerator being equal to the percentage of attainment and the denominator being 50%; and if, at the time of the change in control, the performance measures are at least 50% attained (pro rata based upon the time of the period through the change in control), the award will become fully earned and vested immediately upon the change in control.

​

​

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Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Awards of restricted stock under the 2019 Plan generally entitle holders to voting and dividend rights upon grant and are subject to forfeiture until certain restrictions have lapsed including employment for a specific period. Awards of restricted stock units under the 2019 Plan are also subject to forfeiture until certain restrictions have lapsed including employment for a specific period, but do not entitle holders to voting rights until the restricted period ends and shares are transferred in connection with the units.

​

There were 270,051 and 339,235 restricted stock units issued under the 2019 Plan during the six months ended June 30, 2025, and June 30, 2024, respectively. Compensation expense is recognized over the vesting period of the restricted stock units based on the market value of the award on the issue date. Total compensation cost that has been recorded for the 2019 Plan was $2.7 million for the six months ended June 30, 2025, and $2.2 million for the six months ended June 30, 2024.

​

A summary of changes in the Company’s unvested restricted awards for the six months ended June 30, 2025, is as follows:

​

​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025
​ | ​ | ​ | ​ | Weighted
​ | ​ | Restricted | ​ | Average
​ | ​ | Stock Shares | ​ | Grant Date
​ |  | and Units |  | Fair Value
Unvested at January 1 | ​ | 778,278 | ​ | $ | 14.75
Granted | ​ | 270,051 | ​ | ​ | 18.34
Vested | ​ | (265,615) | ​ | ​ | 14.25
Unvested at June 30 | ​ | 782,714 | ​ | $ | 16.16
​ | ​ | ​ | ​ | ​ | ​

​

Total unrecognized compensation cost of restricted awards was $6.6 million as of June 30, 2025, which is expected to be recognized over a weighted-average period of 2.04 years.

​

Note 10 – Earnings Per Share

​

The earnings per share, both basic and diluted, are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30, | ​
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
Basic earnings per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding | ​ | ​ | 45,053,650 | ​ | ​ | 44,846,848 | ​ | ​ | 45,010,925 | ​ | ​ | 44,802,704 | ​
Net income | ​ | $ | 21,822 | ​ | $ | 21,891 | ​ | $ | 41,652 | ​ | $ | 43,203 | ​
Basic earnings per share | ​ | $ | 0.49 | ​ | $ | 0.48 | ​ | $ | 0.93 | ​ | $ | 0.96 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted earnings per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding | ​ | ​ | 45,053,650 | ​ | ​ | 44,846,848 | ​ | ​ | 45,010,925 | ​ | ​ | 44,802,704 | ​
Dilutive effect of unvested restricted awards 1 | ​ | ​ | 785,815 | ​ | ​ | 835,391 | ​ | ​ | 769,687 | ​ | ​ | 800,358 | ​
Diluted average common shares outstanding | ​ | ​ | 45,839,465 | ​ | ​ | 45,682,239 | ​ | ​ | 45,780,612 | ​ | ​ | 45,603,062 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net Income | ​ | $ | 21,822 | ​ | $ | 21,891 | ​ | $ | 41,652 | ​ | $ | 43,203 | ​
Diluted earnings per share | ​ | $ | 0.48 | ​ | $ | 0.48 | ​ | $ | 0.91 | ​ | $ | 0.95 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
1 Includes the common stock equivalents for restricted share rights that are dilutive. | ​

​

​

​

29

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 11 – Regulatory & Capital Matters

​

The Bank is subject to the risk-based capital regulatory guidelines, which include the methodology for calculating the risk-weighted Bank assets, developed by the Office of the Comptroller of the Currency (the “OCC”) and the other bank regulatory agencies. In connection with the current risk-based capital regulatory guidelines, the Bank’s Board of Directors has established an internal guideline requiring the Bank to maintain a Tier 1 leverage capital ratio at or above eight percent (8%) and a total risk-based capital ratio at or above twelve percent (12%). At June 30, 2025, the Bank exceeded those thresholds.

​

At June 30, 2025, the Bank’s Tier 1 capital leverage ratio was 11.59%, an increase of 69 basis points from December 31, 2024, and is above the 8.00% Board of Directors’ guideline. The Bank’s total capital ratio was 14.99%, an increase of 117 basis points from December 31, 2024, and also above the Board of Directors’ guideline of 12.00%.

​

Bank holding companies are generally required to maintain minimum levels of capital in accordance with capital guidelines implemented by the Board of Governors of the Federal Reserve System. The general bank and holding company capital adequacy guidelines are shown in the accompanying table, as are the capital ratios of the Company and the Bank, as of June 30, 2025, and December 31, 2024.

​

The Basel III Rules are applicable to all banking organizations that are subject to minimum capital requirements, including federal and state banks and savings and loan associations, as well as to bank and savings and loan holding companies, other than “small bank holding companies,” which are generally holding companies with consolidated assets of less than $3.0 billion. A detailed discussion of the Basel III Rules is included in Part I, Item 1 of the Company’s Form 10-K for the year ended December 31, 2024, under the heading “Supervision and Regulation.”

​

At June 30, 2025, and December 31, 2024, the Company, on a consolidated basis, exceeded the minimum thresholds to be considered “well capitalized” under current regulatory defined capital ratios.

​

30

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Capital levels and industry defined regulatory minimum required levels are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Minimum Capital | ​ | Well Capitalized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Adequacy with Capital | ​ | Under Prompt Corrective | ​
​ | ​ | Actual | ​ | Conservation Buffer, if applicable1 | ​ | Action Provisions2 | ​
​ |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio | ​
June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | $ | 645,493 | ​ | 13.77 | % | ​ | $ | 328,137 | ​ | 7.00 | % | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 656,886 | ​ | 14.02 | ​ | ​ | ​ | 327,974 | ​ | 7.00 | ​ | ​ | $ | 304,548 | ​ | 6.50 | %
Total capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 775,776 | ​ | 16.55 | ​ | ​ | ​ | 492,184 | ​ | 10.50 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 702,169 | ​ | 14.99 | ​ | ​ | ​ | 491,846 | ​ | 10.50 | ​ | ​ | ​ | 468,425 | ​ | 10.00 | ​
Tier 1 capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 670,493 | ​ | 14.31 | ​ | ​ | ​ | 398,266 | ​ | 8.50 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 656,886 | ​ | 14.02 | ​ | ​ | ​ | 398,255 | ​ | 8.50 | ​ | ​ | ​ | 374,828 | ​ | 8.00 | ​
Tier 1 capital to average assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 670,493 | ​ | 11.83 | ​ | ​ | ​ | 226,709 | ​ | 4.00 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 656,886 | ​ | 11.59 | ​ | ​ | ​ | 226,708 | ​ | 4.00 | ​ | ​ | ​ | 283,385 | ​ | 5.00 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | $ | 607,294 | ​ | 12.82 | % | ​ | $ | 331,596 | ​ | 7.00 | % | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 610,285 | ​ | 12.89 | ​ | ​ | ​ | 331,419 | ​ | 7.00 | ​ | ​ | $ | 307,747 | ​ | 6.50 | %
Total capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 736,492 | ​ | 15.54 | ​ | ​ | ​ | 497,630 | ​ | 10.50 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 654,484 | ​ | 13.82 | ​ | ​ | ​ | 497,256 | ​ | 10.50 | ​ | ​ | ​ | 473,577 | ​ | 10.00 | ​
Tier 1 capital to risk weighted assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 632,294 | ​ | 13.34 | ​ | ​ | ​ | 402,886 | ​ | 8.50 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 610,285 | ​ | 12.89 | ​ | ​ | ​ | 402,438 | ​ | 8.50 | ​ | ​ | ​ | 378,765 | ​ | 8.00 | ​
Tier 1 capital to average assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consolidated | ​ | ​ | 632,294 | ​ | 11.30 | ​ | ​ | ​ | 223,821 | ​ | 4.00 | ​ | ​ | ​ | N/A | ​ | N/A | ​
Old Second Bank | ​ | ​ | 610,285 | ​ | 10.90 | ​ | ​ | ​ | 223,958 | ​ | 4.00 | ​ | ​ | ​ | 279,947 | ​ | 5.00 | ​

​

1 Amounts are shown inclusive of a capital conservation buffer of 2.50%.

2 The prompt corrective action provisions are only applicable at the Bank level. The Bank exceeded the general minimum regulatory requirements to be considered “well capitalized.”

​

In connection with our adoption of CECL on January 1, 2020, we elected to utilize the five-year CECL transition. As of January 1, 2025, the five-year CECL transition is complete. As of June 30, 2025, the above capital measures of the Company no longer include a modified CECL transition adjustment.

​

31

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Dividend Restrictions

​

In addition to the above requirements, banking regulations and capital guidelines generally limit the amount of dividends that may be paid by a bank without prior regulatory approval. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s profits, combined with the retained profit of the previous two years, subject to the capital requirements described above. As of June 30, 2025, the Bank had capacity to pay dividends of $118.0 million to the Company without prior regulatory approval. Pursuant to the Basel III rules, the Bank must keep a capital conservation buffer of 2.50% above the regulatory minimum capital requirements, which must consist entirely of Common Equity Tier 1 capital in order to avoid additional limitations on capital distributions and certain other payments.

​

Note 12 – Fair Value Measurements

​

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy established by the Company also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Three levels of inputs that may be used to measure fair value are:

​

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the Company has the ability to access as of the measurement date.

​

Level 2: Significant observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, and other inputs that are observable or can be corroborated by observable market data.

​

Level 3: Significant unobservable inputs that reflect a company’s own view about the assumptions that market participants would use in pricing an asset or liability.

​

There were no transfers between levels during the six-month period ended June 30, 2025, and June 30, 2024.

​

Company has certain assets and liabilities measured at fair value. The majority of those assets and liabilities are measured using Level 2 measurement methods. The following is a description of the techniques used to measure all assets and liabilities using Level 2 techniques at fair value as of June 30, 2025, and December 31, 2024:

​

| ● | Government-sponsored agency debt securities are primarily priced using available market information through processes such as benchmark spreads, market valuations of like securities, like securities groupings and matrix pricing.

| ● | Other government-sponsored agency securities, mortgage-backed securities (“MBS”), collateralized mortgage obligations (“CMO”),and some of the actively traded real estate mortgage investment conduits and collateralized mortgage obligations are priced using available market information including benchmark yields, prepayment speeds, spreads, volatility of similar securities and trade date.

| ● | State and political subdivisions are largely grouped by characteristics (e.g., geographical data and source of revenue in trade dissemination systems). Because some securities are not traded daily and due to other grouping limitations, active market quotes are often obtained using benchmarking for like securities.

| ● | Asset-backed collateralized loan obligations(“CLO”), and asset-backed securities (“ABS”) were priced using data from a pricing matrix supported by our bond accounting service provider and are therefore considered Level 2 valuations.

| ● | Residential mortgage loans available for sale in the secondary market are carried at fair market value. The fair value of loans held-for-sale is determined using quoted secondary market prices for similar loans.

| ● | Mortgage banking derivatives, e.g., residential mortgage loans with locked interest rates to be sold in the secondary market and forward commitments for the future delivery of mortgage loans to third party investors, as well as forward commitments for future delivery of MBS, are considered derivatives. Fair values are estimated based on observable changes in mortgage interest rates including prices for MBS from the date of the commitment and do not typically involve significant judgments by management.

​

​

32

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

| ● | The fair value of mortgage servicing rights is based on a valuation model that calculates the present value of estimated net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income to derive the resultant value. The Company is able to compare the valuation model inputs, such as the discount rate, prepayment speeds, weighted average delinquency and foreclosure/bankruptcy rates to widely available published industry data for reasonableness.

| ● | Interest rate swap positions, both assets and liabilities, are based on valuation pricing models using an income approach reflecting readily observable market parameters such as interest rate yield curves.

​

Assets and Liabilities Measured at Fair Value on a Recurring Basis:

​

The tables below present the balance of assets and liabilities at June 30, 2025, and December 31, 2024, respectively, measured by the Company at fair value on a recurring basis:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 190,446 | ​ | $ | - | ​ | $ | - | ​ | $ | 190,446
U.S. government agencies | ​ | ​ | - | ​ | ​ | 38,141 | ​ | ​ | - | ​ | ​ | 38,141
U.S. government agencies mortgage-backed | ​ | ​ | - | ​ | ​ | 96,083 | ​ | ​ | - | ​ | ​ | 96,083
States and political subdivisions | ​ | ​ | - | ​ | ​ | 197,708 | ​ | ​ | 11,106 | ​ | ​ | 208,814
Collateralized mortgage obligations | ​ | ​ | - | ​ | ​ | 395,014 | ​ | ​ | ​ | ​ | ​ | 395,014
Asset-backed securities | ​ | ​ | - | ​ | ​ | 44,684 | ​ | ​ | 3,435 | ​ | ​ | 48,119
Collateralized loan obligations | ​ | ​ | - | ​ | ​ | 201,071 | ​ | ​ | - | ​ | ​ | 201,071
Loans held-for-sale | ​ | ​ | - | ​ | ​ | 3,235 | ​ | ​ | - | ​ | ​ | 3,235
Mortgage servicing rights | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 9,680 | ​ | ​ | 9,680
Interest rate derivatives 1 | ​ | ​ | - | ​ | ​ | 4,452 | ​ | ​ | - | ​ | ​ | 4,452
Mortgage banking derivatives | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | - | ​ | ​ | 1
Total | ​ | $ | 190,446 | ​ | $ | 980,389 | ​ | $ | 24,221 | ​ | $ | 1,195,056
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements, including risk participation agreements | ​ | $ | - | ​ | $ | 1,719 | ​ | $ | - | ​ | $ | 1,719
Total | ​ | $ | - | ​ | $ | 1,719 | ​ | $ | - | ​ | $ | 1,719
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

1 Interest rate derivatives includes interest rate swaps, a rate cap and risk participation agreements.

​

33

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 194,143 | ​ | $ | - | ​ | $ | - | ​ | $ | 194,143
U.S. government agencies | ​ | ​ | - | ​ | ​ | 37,814 | ​ | ​ | - | ​ | ​ | 37,814
U.S. government agencies mortgage-backed | ​ | ​ | - | ​ | ​ | 100,277 | ​ | ​ | - | ​ | ​ | 100,277
States and political subdivisions | ​ | ​ | - | ​ | ​ | 203,560 | ​ | ​ | 11,896 | ​ | ​ | 215,456
Collateralized mortgage obligations | ​ | ​ | - | ​ | ​ | 368,616 | ​ | ​ | - | ​ | ​ | 368,616
Asset-backed securities | ​ | ​ | - | ​ | ​ | 59,049 | ​ | ​ | 3,254 | ​ | ​ | 62,303
Collateralized loan obligations | ​ | ​ | - | ​ | ​ | 183,092 | ​ | ​ | - | ​ | ​ | 183,092
Loans held-for-sale | ​ | ​ | - | ​ | ​ | 1,556 | ​ | ​ | - | ​ | ​ | 1,556
Mortgage servicing rights | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 10,374 | ​ | ​ | 10,374
Interest rate derivatives 1 | ​ | ​ | - | ​ | ​ | 5,526 | ​ | ​ | - | ​ | ​ | 5,526
Mortgage banking derivatives | ​ | ​ | - | ​ | ​ | 55 | ​ | ​ | - | ​ | ​ | 55
Total | ​ | $ | 194,143 | ​ | $ | 959,545 | ​ | $ | 25,524 | ​ | $ | 1,179,212
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements, including risk participation agreements | ​ | $ | - | ​ | $ | 3,192 | ​ | $ | - | ​ | $ | 3,192
Total | ​ | $ | - | ​ | $ | 3,192 | ​ | $ | - | ​ | $ | 3,192

​

​

1 Interest rate derivatives includes interest rate swaps, a rate cap and risk participation agreements.

​

​

The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Six Months Ended June 30, 2025
​ | ​ | Securities available-for-sale | ​ | ​ | ​
​ | ​ | ​ | ​ | States and | ​ | Mortgage
​ | ​ | Asset-backed | ​ | Political | ​ | Servicing
​ |  | Securities | ​ | Subdivisions |  | Rights
Beginning balance January 1, 2025 | ​ | $ | 3,254 | ​ | $ | 11,896 | ​ | $ | 10,374
Transfers out of Level 3 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Total gains or losses | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Included in earnings | ​ | ​ | - | ​ | ​ | - | ​ | ​ | (883)
Included in other comprehensive income | ​ | ​ | (11) | ​ | ​ | (705) | ​ | ​ | -
Purchases, issuances, sales, and settlements | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Purchases | ​ | ​ | 461 | ​ | ​ | - | ​ | ​ | -
Issuances | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 407
Settlements | ​ | ​ | (269) | ​ | ​ | (85) | ​ | ​ | (218)
Ending balance June 30, 2025 | ​ | $ | 3,435 | ​ | $ | 11,106 | ​ | $ | 9,680
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

​

34

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Six Months Ended June 30, 2024 | ​
​ | ​ | ​ | Securities available-for-sale | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | States and | ​ | Mortgage | ​
​ | ​ | Asset-backed | ​ | Political | ​ | Servicing | ​
​ |  | Securities | ​ | Subdivisions |  | Rights |
Beginning balance January 1, 2024 | ​ | $ | 2,270 | ​ | $ | 13,059 | ​ | $ | 10,344 | ​
Transfers out of Level 3 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​
Total gains or losses | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Included in earnings | ​ | ​ | - | ​ | ​ | (66) | ​ | ​ | 88 | ​
Included in other comprehensive income | ​ | ​ | (98) | ​ | ​ | (390) | ​ | ​ | - | ​
Purchases, issuances, sales, and settlements | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Purchases | ​ | ​ | 547 | ​ | ​ | - | ​ | ​ | - | ​
Issuances | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 288 | ​
Settlements | ​ | ​ | (52) | ​ | ​ | (76) | ​ | ​ | (232) | ​
Ending balance June 30, 2024 | ​ | $ | 2,667 | ​ | $ | 12,527 | ​ | $ | 10,488 | ​

​

The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as of June 30, 2025:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
Measured at fair value | ​ | ​ | ​ | ​ | ​ | ​ | Significant Unobservable | ​ | ​ | ​ | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
States and political subdivisions | ​ | $ | 11,106 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 3.6 - 5.1% | ​ | 4.1 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Liquidity Premium | ​ | 0.5 – 0.5% | ​ | 0.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Asset-backed securities | ​ | $ | 3,435 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 5.2 – 5.2% | ​ | 5.2 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ | $ | 9,680 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 9.0 – 11.0% | ​ | 9.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Prepayment Speed | ​ | 4.4 – 36.7% | ​ | 7.4 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as December 31, 2024:

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
Measured at fair value | ​ | ​ | ​ | ​ | ​ | ​ | Significant Unobservable | ​ | ​ | ​ | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
States and political subdivisions | ​ | $ | 11,896 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 5.3 – 5.4% | ​ | 5.4 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Liquidity Premium | ​ | 0.5 – 0.5% | ​ | 0.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Asset-backed securities | ​ | $ | 3,254 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 4.9 – 4.9% | ​ | 4.9 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ | $ | 10,374 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 9.0 – 11.0% | ​ | 9.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Prepayment Speed | ​ | 0.0 – 31.5% | ​ | 6.9 | %

​

​

35

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis:

​

The Company may be required, from time to time, to measure certain other assets at fair value on a nonrecurring basis in accordance with GAAP. These assets consist of individually evaluated loans and OREO. The following is a description of the techniques used to measure these assets using Level 3 techniques at fair value as of June 30, 2025, and December 31, 2024:

​

| ● | The fair value of individually evaluated loans with specific allocations of the allowance for credit losses is essentially based on recent real estate appraisals or the fair value of the collateralized asset. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are made in the appraisal process by the appraisers to reflect differences between the available comparable sales and income data. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value.

| ● | Nonrecurring adjustments to certain commercial and residential real estate properties classified as other real estate owned (“OREO”) are measured at fair value, less costs to sell. Fair values are based on third party appraisals of the property, resulting in a Level 3 classification, or an executed pending sales contract. In cases where the carrying amount exceeds the fair value, less costs to sell, a valuation loss is recognized.

​

​

For assets measured at fair value on a nonrecurring basis at June 30, 2025, and December 31, 2024, respectively, the following tables provide the level of valuation assumptions used to determine each valuation and the carrying value of the related assets:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Individually evaluated loans1 | ​ | $ | - | ​ | $ | - | ​ | $ | 23,483 | ​ | $ | 23,483
Other real estate owned, net2 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 6,486 | ​ | ​ | 6,486
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 29,969 | ​ | $ | 29,969

​

1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, which had a carrying amount of $28.6 million and a valuation allowance of $5.2 million, resulting in a decrease of specific allocations within the allowance for credit losses on loans of $2.0 million for the six months ended June 30, 2025.

2 OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $6.5 million at June 30, 2025, which is made up of the outstanding balance of $7.0 million, net of a valuation allowance of $562,000.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Individually evaluated loans1 | ​ | $ | - | ​ | $ | - | ​ | $ | 19,058 | ​ | $ | 19,058
Other real estate owned, net2 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 21,617 | ​ | ​ | 21,617
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 40,675 | ​ | $ | 40,675

​

1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of

collateral for collateral-dependent loans and to a lesser extent the discounted cash flow, which had a carrying amount of $26.2 million and a valuation allowance of $7.2 million, resulting in a decrease of specific allocations within the allowance for credit losses on loans of $3.9 million for the year December 31, 2024.

2 OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $21.6 million at December 31, 2024, which is made up of the outstanding balance of $23.5 million, net of a valuation allowance of $1.9 million.

​

The Company has estimated the fair values of these assets based primarily on Level 3 inputs. OREO and individually evaluated loans are generally valued using the fair value of collateral provided by third party appraisals. These valuations include assumptions related to cash flow projections, discount rates, and recent comparable sales. The numerical ranges of unobservable inputs for these valuation assumptions are not meaningful.

36

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 13 – Fair Values of Financial Instruments

​

The carrying amount and estimated fair values of financial instruments were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025
​ | ​ | Carrying | ​ | Fair | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amount |  | Value |  | Level 1 |  | Level 2 |  | Level 3
Financial assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and due from banks | ​ | $ | 63,484 | ​ | $ | 63,484 | ​ | $ | 63,484 | ​ | $ | - | ​ | $ | -
Interest earning deposits with financial institutions | ​ | ​ | 78,283 | ​ | ​ | 78,283 | ​ | ​ | 78,283 | ​ | ​ | - | ​ | ​ | -
Securities available-for-sale | ​ | ​ | 1,177,688 | ​ | ​ | 1,177,688 | ​ | ​ | 190,446 | ​ | ​ | 972,701 | ​ | ​ | 14,541
FHLBC and FRBC stock | ​ | ​ | 19,087 | ​ | ​ | 19,087 | ​ | ​ | - | ​ | ​ | 19,087 | ​ | ​ | -
Loans held-for-sale | ​ | ​ | 3,235 | ​ | ​ | 3,235 | ​ | ​ | - | ​ | ​ | 3,235 | ​ | ​ | -
Net loans | ​ | ​ | 3,955,677 | ​ | ​ | 3,904,578 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 3,904,578
Mortgage servicing rights | ​ | ​ | 9,680 | ​ | ​ | 9,680 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 9,680
Interest rate swap and rate cap agreements | ​ | ​ | 4,411 | ​ | ​ | 4,411 | ​ | ​ | - | ​ | ​ | 4,411 | ​ | ​ | -
Interest rate lock commitments and forward contracts | ​ | ​ | 1 | ​ | ​ | 1 | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | -
Interest receivable on securities and loans | ​ | ​ | 25,047 | ​ | ​ | 25,047 | ​ | ​ | - | ​ | ​ | 25,047 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest bearing deposits | ​ | $ | 1,704,083 | ​ | $ | 1,704,083 | ​ | $ | 1,704,083 | ​ | $ | - | ​ | $ | -
Interest bearing deposits | ​ | ​ | 3,094,356 | ​ | ​ | 3,087,048 | ​ | ​ | - | ​ | ​ | 3,087,048 | ​ | ​ | -
Securities sold under repurchase agreements | ​ | ​ | 47,252 | ​ | ​ | 47,252 | ​ | ​ | - | ​ | ​ | 47,252 | ​ | ​ | -
Other short-term borrowings | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | -
Junior subordinated debentures | ​ | ​ | 25,774 | ​ | ​ | 21,651 | ​ | ​ | - | ​ | ​ | 21,651 | ​ | ​ | -
Subordinated debentures | ​ | ​ | 59,510 | ​ | ​ | 55,690 | ​ | ​ | - | ​ | ​ | 55,690 | ​ | ​ | -
Interest rate swap and rate cap agreements | ​ | ​ | 1,710 | ​ | ​ | 1,710 | ​ | ​ | - | ​ | ​ | 1,710 | ​ | ​ | -
Interest payable on deposits and borrowings | ​ | ​ | 3,097 | ​ | ​ | 3,097 | ​ | ​ | - | ​ | ​ | 3,097 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

37

Table of Contents

Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ | ​ | Carrying | ​ | Fair | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amount |  | Value |  | Level 1 |  | Level 2 |  | Level 3
Financial assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and due from banks | ​ | $ | 52,175 | ​ | $ | 52,175 | ​ | $ | 52,175 | ​ | $ | - | ​ | $ | -
Interest earning deposits with financial institutions | ​ | ​ | 47,154 | ​ | ​ | 47,154 | ​ | ​ | 47,154 | ​ | ​ | - | ​ | ​ | -
Securities available-for-sale | ​ | ​ | 1,161,701 | ​ | ​ | 1,161,701 | ​ | ​ | 194,143 | ​ | ​ | 952,408 | ​ | ​ | 15,150
FHLBC and FRBC stock | ​ | ​ | 19,441 | ​ | ​ | 19,441 | ​ | ​ | - | ​ | ​ | 19,441 | ​ | ​ | -
Loans held-for-sale | ​ | ​ | 1,556 | ​ | ​ | 1,556 | ​ | ​ | - | ​ | ​ | 1,556 | ​ | ​ | -
Net loans | ​ | ​ | 3,937,717 | ​ | ​ | 3,818,303 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 3,818,303
Interest rate swap and rate cap agreements | ​ | ​ | 5,498 | ​ | ​ | 5,498 | ​ | ​ | - | ​ | ​ | 5,498 | ​ | ​ | -
Interest rate lock commitments and forward contracts | ​ | ​ | 55 | ​ | ​ | 55 | ​ | ​ | - | ​ | ​ | 55 | ​ | ​ | -
Interest receivable on securities and loans | ​ | ​ | 24,598 | ​ | ​ | 24,598 | ​ | ​ | - | ​ | ​ | 24,598 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest bearing deposits | ​ | $ | 1,704,920 | ​ | $ | 1,704,920 | ​ | $ | 1,704,920 | ​ | $ | - | ​ | $ | -
Interest bearing deposits | ​ | ​ | 3,063,811 | ​ | ​ | 3,056,180 | ​ | ​ | - | ​ | ​ | 3,056,180 | ​ | ​ | -
Securities sold under repurchase agreements | ​ | ​ | 36,657 | ​ | ​ | 36,657 | ​ | ​ | - | ​ | ​ | 36,657 | ​ | ​ | -
Other short-term borrowings | ​ | ​ | 20,000 | ​ | ​ | 20,000 | ​ | ​ | - | ​ | ​ | 20,000 | ​ | ​ | -
Junior subordinated debentures | ​ | ​ | 25,773 | ​ | ​ | 21,444 | ​ | ​ | - | ​ | ​ | 21,444 | ​ | ​ | -
Subordinated debentures | ​ | ​ | 59,467 | ​ | ​ | 54,533 | ​ | ​ | - | ​ | ​ | 54,533 | ​ | ​ | -
Interest rate swap and rate cap agreements | ​ | ​ | 3,187 | ​ | ​ | 3,187 | ​ | ​ | - | ​ | ​ | 3,187 | ​ | ​ | -
Interest payable on deposits and borrowings | ​ | ​ | 3,871 | ​ | ​ | 3,871 | ​ | ​ | - | ​ | ​ | 3,871 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

​

Note 14 – Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk

​

Risk Management Objective of Using Derivatives

​

The Company is exposed to certain risk arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loan portfolio.

​

Cash Flow Hedges of Interest Rate Risk

​

The Company’s objectives in using interest rate derivatives are to add stability to interest income and expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. The aggregate fair value of the swaps is recorded in other assets or other liabilities with changes in fair value recorded in other comprehensive income, net of tax. The amount included in other comprehensive income would be reclassified to current earnings should all or a portion of the hedge no longer be considered effective. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income and subsequently reclassified into interest income or interest expense in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest income or expense as interest payments are received on the variable rate loan pools or paid on the Company’s fixed-rate borrowings.

​

​

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Interest rate swaps with notional amounts totaling $200.0 million as of June 30, 2025, and $300.0 million as of December 31, 2024, were designated as cash flow hedges of certain variable rate commercial and commercial real estate loan pools. Each of these hedges were executed to pay variable and receive fixed rate cash flows. Each of these hedges was determined to be effective during all periods presented and the Company expects the hedges to remain effective during the remaining terms of the swaps.

​

An interest rate swap with a notional amount of $25.8 million as of June 30, 2025, and December 31, 2024, is designated as a cash flow hedge of junior subordinated debentures and was executed to pay fixed and receive variable rate cash flows. The hedge was determined to be effective during all periods presented and the Company expects the hedge to remain effective during the remaining terms of the swap.

​

During the next twelve months, the Company estimates that an additional $336,000 will be reclassified as an increase to interest income and an additional $327,000 will be reclassified as an increase to interest expense.

​

Non-designated Hedges

​

Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers. The Company executes interest rate swaps and rate cap agreements with commercial banking customers to facilitate their respective risk management strategies. The notional amounts of interest rate swaps with its loan customers as of June 30, 2025, and December 31, 2024, were $127.4 million and $121.2 million, respectively. The notional amounts of interest rate cap agreements with its loan customers were $32.9 million as of June 30, 2025, and December 31, 2024. Those interest rate swaps and rate cap agreements are simultaneously hedged by offsetting derivatives that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate derivatives associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer derivatives and the offsetting derivatives are recognized directly in earnings.

​

At June 30, 2025, and December 31, 2024, the Company had $1.8 million, and $2.3 million, respectively, of cash collateral pledged with two correspondent financial institutions. The Company held $3.9 million and $5.2 million of cash pledged from one correspondent financial institution to support the interest rate swap activity during the periods presented, respectively. No investment securities were required to be pledged to any correspondent financial institution during 2025 through June 30, 2025, or during 2024. The Company offsets derivative assets and liabilities that are subject to a master netting arrangement.

​

The Company also grants mortgage loan interest rate lock commitments to borrowers, subject to normal loan underwriting standards. The interest rate risk associated with these loan interest rate lock commitments is managed with contracts for future deliveries of loans as well as selling forward mortgage-backed securities contracts. Loan interest rate lock commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The notional amount of these commitments at June 30, 2025, and December 31, 2024, was $12.5 million and $8.7 million, respectively. Commitments to originate residential mortgage loans held-for-sale and forward commitments to sell residential mortgage loans or forward MBS contracts are considered derivative instruments and changes in the fair value are recorded to mortgage banking revenue. Fair values are estimated based on observable changes in mortgage interest rates including mortgage-backed securities prices from the date of the commitment.

​

​

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of June 30, 2025, and December 31, 2024.

​

Fair Value of Derivative Instruments

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | June 30, 2025
​ | No. of Trans. | ​ | Notional Amount $ | ​ | Balance Sheet Location | Fair Value $ | ​ | Balance Sheet Location | Fair Value $
Derivatives designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements | 3 | ​ | 225,774 | ​ | Other Assets | 3,037 | ​ | Other Liabilities | 336
Total derivatives designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | 3,037 | ​ | ​ | 336
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivatives not designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swaps with commercial loan customers and rate cap | 14 | ​ | 160,263 | ​ | Other Assets | 1,374 | ​ | Other Liabilities | 1,374
Interest rate lock commitments and forward contracts | 30 | ​ | 12,508 | ​ | Other Assets | 1 | ​ | Other Liabilities | -
Other contracts | 5 | ​ | 60,472 | ​ | Other Assets | 41 | ​ | Other Liabilities | 9
Total derivatives not designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | 1,416 | ​ | ​ | 1,383
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | December 31, 2024
​ | No. of Trans. | ​ | Notional Amount $ | ​ | Balance Sheet Location | Fair Value $ | ​ | Balance Sheet Location | Fair Value $
Derivatives designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements | 5 | ​ | 325,774 | ​ | Other Assets | 3,823 | ​ | Other Liabilities | 1,512
Total derivatives designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | 3,823 | ​ | ​ | 1,512
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivatives not designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swaps with commercial loan customers | 13 | ​ | 154,137 | ​ | Other Assets | 1,675 | ​ | Other Liabilities | 1,675
Interest rate lock commitments and forward contracts | 30 | ​ | 8,667 | ​ | Other Assets | 55 | ​ | Other Liabilities | -
Other contracts | 5 | ​ | 58,259 | ​ | Other Assets | 28 | ​ | Other Liabilities | 5
Total derivatives not designated as hedging instruments | ​ | ​ | ​ | ​ | ​ | 1,758 | ​ | ​ | 1,680

​

Disclosure of the Effect of Fair Value and Cash Flow Hedge Accounting

​

The fair value and cash flow hedge accounting related to derivatives covered under ASC Subtopic 815-20 impacted Accumulated Other Comprehensive Income (“AOCI”) and the Income Statement. The gain recognized in AOCI on derivatives totaled $2.0 million as of June 30, 2025, and the loss recognized in AOCI totaled $1.3 million as of June 30, 2024. The amount of the loss reclassified from AOCI to net interest income on the Income Statement was $1.4 million for the six months ended June 30, 2025, and $3.2 million for the six months ended June 30, 2024.

​

Credit-risk-related Contingent Features

​

For derivative transactions involving counterparties who are lending customers of the Company, the derivative credit exposure is managed through the normal credit review and monitoring process, which may include collateralization, financial covenants and/or financial guarantees of affiliated parties. Agreements with such customers require that losses associated with derivative transactions receive payment priority from any funds recovered should a customer default and ultimate disposition of collateral or guarantees occur.

​

Credit exposure to broker/dealer counterparties is managed through agreements with each derivative counterparty that require collateralization of fair value gains owed by such counterparties. Some small degree of credit exposure exists due to timing differences between when a gain may occur and the subsequent point in time that collateral is delivered to secure that gain. This is monitored by the Company and procedures are in place to minimize this exposure. Such agreements also require the Company to collateralize counterparties in circumstances wherein the fair value of the derivatives result in loss to the Company.

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Other provisions of such agreements include the definition of certain events that may lead to the declaration of default and/or the early termination of the derivative transaction(s):

​

| ● | If the Company either defaults or is capable of being declared in default on any of its indebtedness (exclusive of deposit obligations), then the Company could also be declared in default on its derivative obligations.

| ● | If a merger occurs that materially changes the Company's creditworthiness in an adverse manner.

| ● | If certain specified adverse regulatory actions occur, such as the issuance of a Cease and Desist Order, or citations for actions considered Unsafe and Unsound or that may lead to the termination of deposit insurance coverage by the FDIC.

​

The Bank also issues letters of credit, which are conditional commitments that guarantee the performance of a customer to a third party. The credit risk involved and collateral obtained in issuing letters of credit are essentially the same as that involved in extending loan commitments to our customers. In addition to customer related commitments, the Company is responsible for letters of credit commitments that relate to properties held in OREO. The following table represents the Company’s contractual commitments due to letters of credit as of June 30, 2025, and December 31, 2024.

​

The following table is a summary of letter of credit commitments:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025 | ​ | December 31, 2024 | ​
​ |  | Fixed |  | Variable |  | Total |  | Fixed |  | Variable |  | Total |
Letters of credit: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Borrower: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial standby | ​ | $ | 132 | ​ | $ | 23,416 | ​ | $ | 23,548 | ​ | $ | 188 | ​ | $ | 16,322 | ​ | $ | 16,510 | ​
Performance standby | ​ | ​ | 552 | ​ | ​ | 8,675 | ​ | ​ | 9,227 | ​ | ​ | 552 | ​ | ​ | 10,207 | ​ | ​ | 10,759 | ​
​ | ​ | ​ | 684 | ​ | ​ | 32,091 | ​ | ​ | 32,775 | ​ | ​ | 740 | ​ | ​ | 26,529 | ​ | ​ | 27,269 | ​
Non-borrower: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Performance standby | ​ | ​ | - | ​ | ​ | 65 | ​ | ​ | 65 | ​ | ​ | - | ​ | ​ | 67 | ​ | ​ | 67 | ​
Total letters of credit | ​ | $ | 684 | ​ | $ | 32,156 | ​ | $ | 32,840 | ​ | $ | 740 | ​ | $ | 26,596 | ​ | $ | 27,336 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unused loan commitments: | ​ | $ | 134,616 | ​ | $ | 597,483 | ​ | $ | 732,099 | ​ | $ | 163,282 | ​ | $ | 616,533 | ​ | $ | 779,815 | ​

​

As of June 30, 2025, the Company evaluated current market conditions, including any impacts related to market interest rate changes and unused line of credit utilization trends during the first quarter of 2025, and based on that analysis under the CECL methodology, the Company determined credit losses related to unfunded commitments totaled $2.3 million. The resultant increase in the ACL for unfunded commitments of $392,000 for the first six months of 2025 from $1.9 million as of December 31, 2024, was primarily driven by adjustments to historical benchmark assumptions, such as the funding rates and the period used to forecast those rates within the ACL calculation. The Company will continue to assess the credit risk at least quarterly, and adjust the allowance for unfunded commitments, which is carried within other liabilities on our Consolidated Balance Sheets, as needed, with the appropriate offsetting entry to the provision for credit losses on our Consolidated Statements of Income.

​

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Old Second Bancorp, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Dollar amounts in thousands, except per share data, unaudited)

​

Note 15 – Segment Information

​

Various identifiable operating segments provide a variety of revenue streams including loans, deposits, and wealth management services. The Company’s Chief Operating Decision Maker (CODM) is the Chief Financial Officer.

​

Through our wholly-owned subsidiary, the Bank, we offer a wide variety of community banking services primarily throughout the Chicagoland area, including commercial and consumer lending and deposit services, and a wide array of wealth management services. The accounting policies for the services discussed here are the same as those described in Note 1: Summary of Significant Accounting Policies. We earn interest income on portfolio loans, fee income on loan originations and commitments, fees charged on certain deposit accounts, as well as fees related to wealth management services.

​

Although information is available on each of the individual revenue streams, the CODM manages, allocates resources, and evaluates performance on a company-wide basis. The CODM uses consolidated net income to evaluate the financial performance of the Company’s business along with budget to actual results in assessing the Company’s performance and in determining the allocation of resources whether it be to reinvest in the Company or deploy capital in order to maximize shareholder value. The CODM uses consolidated net income and return on average assets to benchmark the Company against competitors as well as against prior periods.

​

On a regular basis the CODM is provided consolidated income and expense, assets, liabilities, and equity, in the same manner that is presented publicly on the Consolidated Statements of Income and Consolidated Balance Sheets, to assess performance and allocate resources throughout the Company. Further, additional internal financial information is provided to the CODM in order to assess credit quality in each of our lending segments. Accordingly, the Company has determined that it has only one reportable segment, Community Banking.

​

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

​

Overview

​

The following discussion provides additional information regarding our operations for the three and six months ended June 30, 2025, compared to the three and six months ended June 30, 2024, and our financial condition at June 30, 2025, compared to December 31, 2024. This discussion should be read in conjunction with our consolidated financial statements as well as the financial and statistical data appearing elsewhere in this report and our Form 10-K for the year ended December 31, 2024. The results of operations for the three and six months ended June 30, 2025, are not necessarily indicative of future results. Dollar amounts presented in the following tables are in thousands, except per share data, and June 30, 2025 and 2024 amounts are unaudited.

​

In this report, unless the context suggests otherwise, references to the “Company,” “we,” “us,” and “our” mean the combined business of Old Second Bancorp, Inc. and its subsidiary bank, Old Second National Bank (the “Bank”).

​

We have made, and will continue to make, various forward-looking statements with respect to financial and business matters. Comments regarding our business that are not historical facts are considered forward-looking statements that involve inherent risks and uncertainties. Actual results may differ materially from those contained in these forward-looking statements. For additional information regarding our cautionary disclosures, see the “Cautionary Note Regarding Forward-Looking Statements” on page 3 of this report.

​

Business Overview

​

The Company is a bank holding company headquartered in Aurora, Illinois. Through our wholly-owned subsidiary bank, Old Second National Bank, a national banking organization also headquartered in Aurora, Illinois (the “Bank”), we offer a wide range of financial services through our 53 banking centers located in Cook, DeKalb, DuPage, Kane, Kendall, LaSalle and Will counties in Illinois. These banking centers offer access to a full range of traditional retail and commercial banking services including treasury management operations as well as fiduciary and wealth management services. We focus our business on establishing and maintaining relationships with our clients while maintaining a commitment to provide for the financial services needs of the communities in which we operate. We emphasize relationships with individual customers as well as small to medium-sized businesses throughout our market area. We also have extensive wealth management services, which includes a registered investment advisory platform in addition to trust administration and trust services related to personal and corporate trusts and employee benefit plan administration services.

​

On December 6, 2024, we completed our branch transaction with First Merchants Bank (“FRME”). Under the terms of the purchase and assumption agreement, we assumed approximately $268.0 million in deposits related to the branch locations acquired and purchased approximately $7.1 million in branch-related loans along with other branch-related assets. The five branches acquired in the transaction are located in Cook and DuPage counties in Illinois as part the branch purchase agreement.

​

On July 1, 2025, we completed our previously announced merger with Bancorp Financial Inc. (“Bancorp Financial”), pursuant to the agreement and plan of merger dated February 24, 2025. At the effective time of the merger, Bancorp Financial merged with and into the Company, with the Company continuing as the surviving corporation. Immediately following the merger, Evergreen Bank Group, an Illinois-chartered banking corporation and wholly owned subsidiary of Bancorp Financial, merged with and into Old Second National Bank, with the Bank continuing as the surviving bank. Under the terms of the merger agreement, each share of Bancorp Financial common stock outstanding immediately prior to the effective time was converted into the right to receive 2.5814 shares of Old Second common stock and $15.93 in cash, without interest, with cash paid in lieu of any fractional shares.

​

Our results of operations depend generally on net interest income, which is the difference between interest income from interest-earning assets and interest expense on interest-bearing liabilities. Net interest income is affected by regulatory, economic and competitive factors that influence interest rates, loan demand and deposit flows. In addition, we are subject to interest rate risk to the degree that our interest-earning assets mature or reprice at different times, or at different speeds, than our interest-bearing liabilities. Our results of operations are also affected by noninterest income, such as service charges, wealth management fees, loan fees, gains from the sale of newly originated loans, gains or losses on investments and certain other noninterest related items. Our principal operating expenses, aside from interest expense, consist of compensation and employee benefits, occupancy costs, professional fees, data processing expenses and provision for credit losses.

We are significantly impacted by prevailing economic conditions, including federal monetary and fiscal policies, and federal regulations of financial institutions. Deposit balances are influenced by numerous factors such as competing investments, the level of income and the personal rate of savings within our market areas. Factors influencing lending activities include the demand for housing and the interest rate pricing competition from other lending institutions.

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​

As of June 30, 2025, all of our capital ratios were in excess of all regulatory requirements. While we believe that we have sufficient capital to withstand an extended economic recession, our reported and regulatory capital ratios could be adversely impacted by credit losses.

​

Financial Overview

​

Net income for the second quarter of 2025 was $21.8 million, or $0.48 per diluted share, compared to $19.8 million, or $0.43 per diluted share, for the first quarter of 2025, and $21.9 million, or $0.48 per diluted share, for the second quarter of 2024. Net income was relatively flat compared to the prior year, and variances included an increase of $5.5 million in noninterest expense and a $229,000 decrease in noninterest income, partially offset by a $4.5 million increase in net interest and dividend income and a $1.3 million decrease in provision for credit losses. Adjusted net income, a non-GAAP financial measure that excludes mortgage servicing rights mark to market activity and certain nonrecurring items, as applicable, was $22.8 million for the second quarter of 2025, compared to $20.6 million for the first quarter of 2025, and $21.2 million for the second quarter of 2024.

​

See the discussion entitled “Non-GAAP Financial Measures” on page 46, as well as the table below, which provides a reconciliation of this non-GAAP measure to the most comparable GAAP equivalents.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quarters Ended | ​ | ​ | Six Months Ended
​ | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | ​ | June 30,
​ |  | 2025 |  | 2025 | ​ | 2024 | ​ |  | 2025 | ​ | 2024
Net Income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income before income taxes (GAAP) | ​ | $ | 29,213 | ​ | $ | 26,200 | ​ | $ | 29,190 | ​ | ​ | $ | 55,413 | ​ | $ | 57,733
Pre-tax income adjustments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Death benefit related to BOLI | ​ | ​ | - | ​ | ​ | - | ​ | ​ | (893) | ​ | ​ | ​ | - | ​ | ​ | (893)
MSR losses | ​ | ​ | 531 | ​ | ​ | 570 | ​ | ​ | 238 | ​ | ​ | ​ | 1,101 | ​ | ​ | 144
Merger related costs, net of losses on branch sales | ​ | ​ | 810 | ​ | ​ | 454 | ​ | ​ | - | ​ | ​ | ​ | 1,264 | ​ | ​ | -
Adjusted net income before taxes | ​ | ​ | 30,554 | ​ | ​ | 27,224 | ​ | ​ | 28,535 | ​ | ​ | ​ | 57,778 | ​ | ​ | 56,984
Taxes on adjusted net income | ​ | ​ | 7,730 | ​ | ​ | 6,619 | ​ | ​ | 7,359 | ​ | ​ | ​ | 14,349 | ​ | ​ | 14,566
Adjusted net income (non-GAAP) | ​ | $ | 22,824 | ​ | $ | 20,605 | ​ | $ | 21,176 | ​ | ​ | $ | 43,429 | ​ | $ | 42,418
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic earnings per share (GAAP) | ​ | $ | 0.49 | ​ | $ | 0.44 | ​ | $ | 0.48 | ​ | ​ | $ | 0.93 | ​ | $ | 0.96
Diluted earnings per share (GAAP) | ​ | ​ | 0.48 | ​ | ​ | 0.43 | ​ | ​ | 0.48 | ​ | ​ | ​ | 0.91 | ​ | ​ | 0.95
Adjusted basic earnings per share (non-GAAP) | ​ | ​ | 0.50 | ​ | ​ | 0.46 | ​ | ​ | 0.46 | ​ | ​ | ​ | 0.96 | ​ | ​ | 0.94
Adjusted diluted earnings per share (non-GAAP) | ​ | ​ | 0.50 | ​ | ​ | 0.45 | ​ | ​ | 0.46 | ​ | ​ | ​ | 0.95 | ​ | ​ | 0.93

​

The following provides an overview of some of the factors impacting our financial performance for the three-month period ended June 30, 2025, compared to the like period ended June 30, 2024:

​

| ● | Net interest and dividend income was $64.2 million for the second quarter of 2025, compared to $59.7 million for the second quarter of 2024. The increase in net interest and dividend income in the second quarter of 2025 was primarily due to higher securities yields, higher interest earning deposit income, and lower other short-term borrowing costs, partially offset by higher deposit costs.

​

| ● | We recorded a net provision for credit losses on loans and leases of $2.2 million in the second quarter of 2025, driven by quarterly gross charge-offs of $1.2 million, as well as an increase in select qualitative factors primarily driven by recent global tariff volatility and a slight uptick in the macro-economic unemployment assumptions used for forecast. Partially offsetting these increases to provision for credit losses were reductions in qualitative factor adjustments related to stress testing results on underlying collateral for commercial real estate office and healthcare properties. Further, we recorded a $277,000 provision for credit losses on unfunded commitments in the second quarter of 2025 based on an adjustment of historical benchmark assumptions, such as funding rates and the period used to forecast those rates, within the ACL calculation. We recorded a net provision for credit losses of $3.8 million in the second quarter of 2024.

​

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​

| ● | Noninterest income was $10.9 million for the second quarter of 2025, compared to $11.1 million for the second quarter of 2024. Contributing to the lower noninterest income were no death benefits realized on BOLI compared to an $893,000 death benefit recorded in the second quarter of 2024. Also contributing to the reduction in noninterest income during the quarter were decreases in residential mortgage banking revenue on faster prepayment speeds, and the cash surrender value of BOLI as a result of a decrease in the market value of our Company Owned Life Insurance (“COLI”) component. Partially offsetting the decrease in noninterest income were increases in wealth management income, service charges on deposits, card related income, and other income.

​

| ● | Noninterest expense was $43.4 million for the second quarter of 2025, compared to $37.9 million for the second quarter of 2024, an increase of $5.5 million, or 14.6%. Contributing to the increase in noninterest expense in the second quarter of 2025 was higher salaries and employee benefits as well as increases in occupancy, furniture and equipment, computer and data processing, amortization of core deposit intangibles, legal fees, and other expense, all of which were primarily due to Bancorp Financial and FRME acquisition related costs.

​

| ● | We had a provision for income tax expense of $7.4 million for the second quarter of 2025, compared to a provision for income tax expense of $7.3 million for the second quarter of 2024. The effective tax rate for these two periods was 25.3% and 25.0%, respectively.

​

| ● | As of June 30, 2025, we experienced an increase of $17.3 million in total loans compared to the year ended December 31, 2024, and an increase of $22.1 million in total loans compared to June 30, 2024. We believe we can still achieve additional loan growth in 2025 despite a softer outlook in business and trading activities. We continue to seek to provide value to our customers and the communities in which we operate, by executing on growth opportunities in our local markets and developing new banking relationships, while seeking to ensure the safety and soundness of our Bank, our customers, and our employees.

​

| ● | Nonaccrual loans increased $3.1 million as of June 30, 2025, compared to December 31, 2024, but decreased $10.1 million compared to June 30, 2024. The increase in nonaccrual loans in the second quarter of 2025, compared to December 31, 2024, was primarily due to inflows of $16.7 million on 30 loans, consisting primarily of 10 commercial loans totaling $10.9 million. The inflows are partially offset by $5.1 million of net charge-offs year to date, as well as $2.5 million of paid off nonaccrual loans, $5.0 million transferred to OREO, and $4.6 million reduction of principal. The decrease in nonaccrual loans year over year is due to various charge-offs, primarily in the Commercial portfolio, larger transfers to OREO in late 2024 which were sold in the first quarter of 2025, and an increase in paid off loans over the last twelve months, primarily related to the CRE-Investor portfolio, the majority of which are office and healthcare loans. Nonperforming loans as a percent of total loans was 0.8% as of June 30, 2025, compared to 0.7% as of December 31, 2024, and 1.1% as of June 30, 2024. Classified assets decreased to $104.3 million as of June 30, 2025, which is $9.8 million, or 8.5%, less than December 31, 2024, and $25.0 million, or 19.3%, less than June 30, 2024.

​

Critical Accounting Estimates

​

Our consolidated financial statements are prepared based on the application of accounting policies in accordance with generally accepted accounting principles (“GAAP”) and follow general practices within the banking industry. These policies require the reliance on estimates and assumptions, which may prove inaccurate or are subject to variations. These estimates, assumptions, and judgments are based on information available as of the date of the consolidated financial statements. Future changes in information may affect these estimates, assumptions, and judgments, which, in turn, may affect amounts reported in the consolidated financial statements. Changes in underlying factors, assumptions, or estimates could have a material impact on our future financial condition and results of operations.

​

Of the significant accounting policies used in the preparation of our consolidated financial statements, we have identified certain items as critical accounting policies based on the associated estimates, assumptions, judgments and complexity. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Estimates” in our Annual Report on Form 10-K for the year ended December 31, 2024. There have been no material changes to our critical accounting policies or the estimates made pursuant to those policies during the most recent quarter from those disclosed in our 2024 Annual Report in Form 10-K.

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​

Non-GAAP Financial Measures

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This report contains references to financial measures that are not defined in GAAP. Such non-GAAP financial measures include the presentation of net interest income and net interest margin on a tax equivalent (“TE”) basis, adjusted net income, adjusted basic and diluted earnings per share, our adjusted efficiency ratio, and our tangible common equity to tangible assets ratio. Management believes that the presentation of these non-GAAP financial measures (a) provides important supplemental information that contributes to a proper understanding of our operating performance, (b) enables a more complete understanding of factors and trends affecting our business, and (c) allows investors to evaluate our performance in a manner similar to management, the financial services industry, bank stock analysts, and bank regulators. Management uses non-GAAP measures as follows: in the preparation of our operating budgets, monthly financial performance reporting, and in our presentation of our performance to investors. However, we acknowledge that these non-GAAP financial measures have a number of limitations. Limitations associated with non-GAAP financial measures include the risk that persons might disagree as to the appropriateness of items comprising these measures and that different companies might calculate these measures differently. These measures should not be considered an alternative to our GAAP results. A reconciliation of non-GAAP financial measures to the most directly comparable GAAP financial measures is presented below or alongside the first instance where each non-GAAP financial measure is used.

Results of Operations

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Overview

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Three months ended June 30, 2025 and 2024

Our income before taxes was $29.2 million in both the second quarter of 2025 and the second quarter of 2024. Net interest and dividend income increased $4.5 million, and provision for credit losses decreased $1.3 million in the second quarter of 2025 compared to the like 2024 quarter. Income before taxes was negatively impacted by a $229,000 decrease in noninterest income and a $5.5 million increase in noninterest expense. The noninterest expense increase of $5.5 million is primarily due to a $3.5 million increase in salary and employee benefits expense, a $578,000 increase in occupancy, furniture and equipment, a $508,000 increase in computer and data processing, a $448,000 increase in amortization of core deposit intangibles, and a $332,000 increase in other expenses, which were primarily driven by acquisition related costs. Our net income was $21.8 million, or $0.48 per diluted share, for the second quarter of 2025, compared to net income of $21.9 million, or $0.48 per diluted share, for the second quarter of 2024. The Bank remains well positioned to navigate uncertain macroeconomics. We have proactively addressed interest rate risk, maintained disciplined expense management, and ensured robust daily liquidity oversight. In addition, our liquidity metrics remain solid, and our short-duration securities portfolio provides flexibility for near-term funding requirements.

Net interest and dividend income was $64.2 million in the second quarter of 2025, compared to $59.7 million in the second quarter of 2024. The $4.5 million increase was driven by a decrease in other short-term borrowings in the second quarter of 2025, compared to the second quarter of 2024, primarily due to these borrowings being completely paid down in the first quarter of 2025, as well as a $2.0 million increase in interest and dividend income due to increased security yields. A net increase of $836,000 on deposit interest expense in the second quarter of 2025 negatively impacted net interest and dividend income compared to the second quarter of 2024.

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Six months ended June 30, 2025 and 2024

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Our income before taxes was $55.4 million for the six months ended June 30, 2025, compared to $57.7 million for the six months ended June 30, 2024. This decrease in pretax income was primarily due to an $11.8 million increase in noninterest expense and a $529,000 decrease in noninterest income. These changes were partially offset by a $7.7 million increase in net interest and dividend income and a $2.4 million decrease in provision for credit losses. Our net income was $41.7 million, or $0.91 per diluted share, for the six months ended June 30, 2025, compared to net income of $43.2 million, or $0.95 per diluted share, for the same period of 2024.

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Net interest and dividend income was $127.1 million for the six months ended June 30, 2025, compared to $119.5 million for the same period of 2024. The $7.7 million increase was primarily driven by a decrease in interest expense in the first six months of 2025, compared to the first six months of 2024, driven by a reduction in other short-term borrowings expense as the remainder of these borrowings were paid off in the first quarter of 2025. Also contributing to the increase in net interest and dividend income was a $2.4 million increase in securities related income due to the year over year increase in yield in the securities portfolio. Lower interest expenses were partially offset by the effect of market interest rates on our loan portfolio, which contributed a $1.2 million decrease in loan related income.

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Net Interest Income

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Net interest income, which is our primary source of earnings, is the difference between income earned on interest-earning assets, such as loans and investment securities, accretion income on purchased loans, dividend income earned on certain equity investments, and expense incurred on interest-bearing liabilities, such as deposits and borrowings. Net interest income depends upon the relative mix of interest-earning assets and interest-bearing liabilities, the ratio of interest-earning assets to total assets and of interest-bearing liabilities to total funding sources, and movements in market interest rates. Our net interest income can be significantly influenced by a variety of factors, including overall loan demand, economic conditions, credit risk, the amount of nonearning assets including nonperforming loans and OREO, the amounts of and rates at which assets and liabilities reprice, variances in prepayment of loans and securities, early withdrawal of deposits, exercise of call options on borrowings or securities, a general rise or decline in interest rates, changes in the slope of the yield-curve, and balance sheet growth or contraction.

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Three months ended June 30, 2025 and 2024

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The decreased yield of two basis points on interest earning assets compared to the linked period was primarily driven by a lower yield on FHLBC and FRBC Stock due to less capital stock dividends received during the second quarter of 2025 and repricing within the loan portfolio. Changes in the market interest rate environment impact earning assets at varying intervals depending on the repricing timeline of loans, as well as the securities maturity, paydown and purchase activities.

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The year over year increase of one basis point on interest earning assets was primarily driven by maturities in our securities portfolio with many older and lower yielding securities maturing and being replaced with higher yielding investments while maintaining the shorter duration portfolio composition. Average balances of securities available for sale increased $10.7 million in the second quarter of 2025 compared to the prior year like quarter, with a corresponding increase to the tax equivalent yield on the securities available for sale portfolio of 41 basis points year over year primarily due to variable security rate resets and new higher yielding securities. Average balances of loans and loans held for sale increased $2.1 million in the second quarter of 2025 compared to the prior year like quarter, while the tax equivalent yield on loans and loans held for sale decreased four basis points.

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Average balances of interest bearing deposit accounts have increased slightly since the first quarter of 2025 through the second quarter of 2025, from $3.10 billion to $3.12 billion, as NOW and money market account average balances increased, while savings and time deposit accounts decreased. We have continued to control the cost of funds over the periods reflected by monitoring market activity as well as allowing previous exception-priced deposits to runoff naturally, which resulted in only a two basis point increase in the cost of interest bearing deposits, from 128 basis points for the quarter ended March 31, 2025, to 130 basis points for the quarter ended June 30, 2025. A 17-basis point increase in money market accounts for the quarter ended June 30, 2025, drove a significant portion of the increase from the prior linked quarter, with a 10-basis point decrease in the cost of time deposits partially offsetting the overall change in the cost of deposits. The cost of interest bearing deposits decreased three basis points for the quarter ended June 30, 2025, from 133 basis points for the quarter ended June 30, 2024. A 67-basis point decrease in the cost of time deposit accounts drove a significant portion of the overall decrease from the prior year like quarter.

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Borrowing costs decreased slightly in the second quarter of 2025, compared to the first quarter of 2025, primarily due to the $1.4 million decrease in average other short-term borrowings stemming from a decrease in average daily FHLB advances over the prior linked quarter as the remainder of this borrowing was already paid down early in the first quarter of 2025. The decrease of $242.9 million year over year of average FHLB advances was based on daily liquidity needs and was the primary driver of the $3.3 million decrease to interest expense on other short-term borrowings. Subordinated and junior subordinated debt interest expense were essentially flat over each of the periods presented.

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Our net interest margin, for both GAAP and TE presentations, showed nominal declines over the prior linked quarter periods, but healthy growth over the prior year like quarter presented above. Our net interest margin (GAAP) decreased two basis points to 4.83% for the second quarter of 2025, compared to 4.85% for the first quarter of 2025, but increased 23 basis points compared to 4.60% for the second quarter of 2024. Our net interest margin (TE) decreased three basis points to 4.85% for the second quarter of 2025, compared to 4.88% for the first quarter of 2025, but increased 22 basis points compared to 4.63% for the second quarter of 2024. The decrease in net interest margin for the second quarter of 2025, compared to the prior linked quarter, was driven by market interest rates on securities and one more day in the period with larger interest earning asset balances. The net interest margin increased in the second quarter of 2025, compared to the prior year like quarter, primarily due to higher security yields as well as the decrease in average other short-term borrowings and the corresponding reduction in interest expense. See the discussion entitled “Non-GAAP Financial Measures,” above, and the tables beginning on page 51 that provide a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent.

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Six months ended June 30, 2025 and 2024

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The year over year increase of five basis points on interest earning assets was driven by increased yields on our securities portfolio. The securities portfolio was primarily impacted by maturities and paydowns of lower yielding assets and timely purchase of higher yielding securities as we work to increase the weighted average yield in the portfolio while maintaining short duration. Average securities available-for-sale increased $4.6 million for the six months ended June 30, 2025, compared to the six months ended June 30, 2024, due to strategic purchases of securities. Due to market interest rate increases year over year, securities available-for-sale interest income yields were higher in the six months ended June 30, 2025, leading to an increase in securities income to $22.3 million for the six months ended June 30, 2025, compared to $19.9 million for the like 2024 period. Average loans, including loans held for sale, decreased $29.1 million in the six months ended June 30, 2025, compared to the six months ended June 30, 2024. Flat loan yields and lower average balances resulted in $123.6 million of loan and dividend interest income in the six months ended June 30, 2025, compared to $124.9 million in the like 2024 period.

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Average balances of interest bearing deposit accounts have increased significantly since June 30, 2024, through the six months ended June 30, 2025, from $2.78 billion to $3.11 billion driven by the FRME acquisition, with these increases reflected in all categories other than savings accounts. We have continued to control the cost of funds over the periods reflected, with the rate of overall interest bearing deposits increasing by four basis points to 129 basis points from 125 basis points as of June 30, 2024. A 20-basis point increase in the cost of money market funds as of June 30, 2025, compared to June 30, 2024, was due to select deposit account exception pricing and drove a significant portion of the overall increase. Also contributing to the overall increase was an 11-basis point increase in savings accounts as interest paid on savings accounts increased with the goal of remaining competitive to peer offerings, compared to the six months ended June 30, 2024, while the average balance decreased. Interest expense paid on time deposits partially offset the growth in cost of deposits year over year, as the cost of average time deposits decreased 45 basis points to 265 basis points for the six months ended June 30, 2025, compared to 310 basis points for the six months ended June 30, 2024.

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Our borrowing interest expense was controlled over the past twelve months due to lower FHLB advance volumes as the remaining advances were paid off in the first quarter of 2025. This resulted in an average balance decrease of $286.8 million compared to the six months ended June 30, 2024, with an accompanying decrease of $7.9 million of interest expense. Subordinated and junior subordinated debt interest expense remained flat over the periods presented.

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Our net interest margin (GAAP) increased 26 basis points to 4.84% for the six months ended June 30, 2025, compared to 4.58% for the six months ended June 30, 2024. Our net interest margin (TE) increased 27 basis points to 4.87% for the six months ended June 30, 2025, compared to 4.60% for the six months ended June 30, 2024. The increase in the current period, compared to the prior year like period, is primarily due to lower interest expense related to the lower average balances and interest on other short-term borrowings and increased yields on securities.

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We continue to observe competitive pressure to maintain reduced interest rates on loans retained at renewal. While our loan prices are targeted to achieve certain returns on equity, significant competition for commercial and industrial loans as well as commercial real estate loans has put pressure on loan yields, and our stringent underwriting standards limit our ability to make higher-yielding loans.

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The following tables set forth certain information relating to our average consolidated balance sheets and reflect the yield on average earning assets and cost of average interest bearing liabilities for the periods indicated. These yields reflect the related interest, on an annualized basis, divided by the average balance of assets or liabilities over the applicable period. Average balances are derived from daily balances. For purposes of discussion, net interest income and net interest income to total earning assets in the following tables have been adjusted to a non-GAAP TE basis using a marginal rate of 21% in 2025 and 2024 to compare returns more appropriately on tax-exempt loans and securities to other earning assets.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Analysis of Average Balances,
Tax Equivalent Income / Expense and Rates
(Dollars in thousands - unaudited)
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​ | ​ | Quarters Ended
​ | ​ | June 30, 2025 | ​ | March 31, 2025 | ​ | June 30, 2024
​ | ​ | Average | ​ | Income / | ​ | Rate | ​ | Average | ​ | Income / | ​ | Rate | ​ | Average | ​ | Income / | ​ | Rate
​ | ​ | Balance | ​ | Expense | ​ | % | ​ | Balance | ​ | Expense | ​ | % | ​ | Balance | ​ | Expense | ​ | %
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest earning deposits with financial institutions | ​ | $ | 166,366 | ​ | $ | 1,784 | ​ | 4.30 | ​ | $ | 97,645 | ​ | $ | 988 | ​ | 4.10 | ​ | $ | 50,740 | ​ | $ | 625 | ​ | 4.95
Securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxable | ​ | ​ | 1,040,472 | ​ | ​ | 9,959 | ​ | 3.84 | ​ | ​ | 1,026,233 | ​ | ​ | 9,227 | ​ | 3.65 | ​ | ​ | 1,016,187 | ​ | ​ | 8,552 | ​ | 3.38
Non-taxable (TE)1 | ​ | ​ | 149,651 | ​ | ​ | 1,556 | ​ | 4.17 | ​ | ​ | 155,024 | ​ | ​ | 1,595 | ​ | 4.17 | ​ | ​ | 163,243 | ​ | ​ | 1,636 | ​ | 4.03
Total securities (TE)1 | ​ | ​ | 1,190,123 | ​ | ​ | 11,515 | ​ | 3.88 | ​ | ​ | 1,181,257 | ​ | ​ | 10,822 | ​ | 3.72 | ​ | ​ | 1,179,430 | ​ | ​ | 10,188 | ​ | 3.47
FHLBC and FRBC Stock | ​ | ​ | 19,200 | ​ | ​ | 273 | ​ | 5.70 | ​ | ​ | 19,441 | ​ | ​ | 473 | ​ | 9.87 | ​ | ​ | 27,574 | ​ | ​ | 584 | ​ | 8.52
Loans and loans held-for-sale1, 2 | ​ | ​ | 3,960,650 | ​ | ​ | 62,002 | ​ | 6.28 | ​ | ​ | 3,959,073 | ​ | ​ | 61,626 | ​ | 6.31 | ​ | ​ | 3,958,504 | ​ | ​ | 62,180 | ​ | 6.32
Total interest earning assets | ​ | ​ | 5,336,339 | ​ | ​ | 75,574 | ​ | 5.68 | ​ | ​ | 5,257,416 | ​ | ​ | 73,909 | ​ | 5.70 | ​ | ​ | 5,216,248 | ​ | ​ | 73,577 | ​ | 5.67
Cash and due from banks | ​ | ​ | 47,875 | ​ | ​ | - | ​ | - | ​ | ​ | 52,550 | ​ | ​ | - | ​ | - | ​ | ​ | 54,286 | ​ | ​ | - | ​ | -
Allowance for credit losses on loans | ​ | ​ | (41,544) | ​ | ​ | - | ​ | - | ​ | ​ | (43,543) | ​ | ​ | - | ​ | - | ​ | ​ | (43,468) | ​ | ​ | - | ​ | -
Other noninterest earning assets | ​ | ​ | 394,036 | ​ | ​ | - | ​ | - | ​ | ​ | 407,894 | ​ | ​ | - | ​ | - | ​ | ​ | 388,392 | ​ | ​ | - | ​ | -
Total assets | ​ | $ | 5,736,706 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,674,317 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,615,458 | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities and Stockholders' Equity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
NOW accounts | ​ | $ | 653,334 | ​ | $ | 681 | ​ | 0.42 | ​ | $ | 628,336 | ​ | $ | 629 | ​ | 0.41 | ​ | $ | 570,523 | ​ | $ | 639 | ​ | 0.45
Money market accounts | ​ | ​ | 832,777 | ​ | ​ | 3,920 | ​ | 1.89 | ​ | ​ | 801,178 | ​ | ​ | 3,393 | ​ | 1.72 | ​ | ​ | 691,214 | ​ | ​ | 2,915 | ​ | 1.70
Savings accounts | ​ | ​ | 938,836 | ​ | ​ | 1,005 | ​ | 0.43 | ​ | ​ | 940,894 | ​ | ​ | 891 | ​ | 0.38 | ​ | ​ | 934,161 | ​ | ​ | 763 | ​ | 0.33
Time deposits | ​ | ​ | 695,946 | ​ | ​ | 4,508 | ​ | 2.60 | ​ | ​ | 725,314 | ​ | ​ | 4,829 | ​ | 2.70 | ​ | ​ | 610,705 | ​ | ​ | 4,961 | ​ | 3.27
Interest bearing deposits | ​ | ​ | 3,120,893 | ​ | ​ | 10,114 | ​ | 1.30 | ​ | ​ | 3,095,722 | ​ | ​ | 9,742 | ​ | 1.28 | ​ | ​ | 2,806,603 | ​ | ​ | 9,278 | ​ | 1.33
Securities sold under repurchase agreements | ​ | ​ | 35,419 | ​ | ​ | 56 | ​ | 0.63 | ​ | ​ | 34,529 | ​ | ​ | 68 | ​ | 0.80 | ​ | ​ | 37,430 | ​ | ​ | 83 | ​ | 0.89
Other short-term borrowings | ​ | ​ | - | ​ | ​ | - | ​ | - | ​ | ​ | 1,444 | ​ | ​ | 17 | ​ | 4.77 | ​ | ​ | 242,912 | ​ | ​ | 3,338 | ​ | 5.53
Junior subordinated debentures | ​ | ​ | 25,773 | ​ | ​ | 288 | ​ | 4.48 | ​ | ​ | 25,773 | ​ | ​ | 288 | ​ | 4.53 | ​ | ​ | 25,773 | ​ | ​ | 288 | ​ | 4.49
Subordinated debentures | ​ | ​ | 59,500 | ​ | ​ | 546 | ​ | 3.68 | ​ | ​ | 59,478 | ​ | ​ | 546 | ​ | 3.72 | ​ | ​ | 59,414 | ​ | ​ | 546 | ​ | 3.70
Total interest bearing liabilities | ​ | ​ | 3,241,585 | ​ | ​ | 11,004 | ​ | 1.36 | ​ | ​ | 3,216,946 | ​ | ​ | 10,661 | ​ | 1.34 | ​ | ​ | 3,172,132 | ​ | ​ | 13,533 | ​ | 1.72
Noninterest bearing deposits | ​ | ​ | 1,729,287 | ​ | ​ | - | ​ | - | ​ | ​ | 1,703,382 | ​ | ​ | - | ​ | - | ​ | ​ | 1,769,543 | ​ | ​ | - | ​ | -
Other liabilities | ​ | ​ | 59,580 | ​ | ​ | - | ​ | - | ​ | ​ | 70,411 | ​ | ​ | - | ​ | - | ​ | ​ | 68,530 | ​ | ​ | - | ​ | -
Stockholders' equity | ​ | ​ | 706,254 | ​ | ​ | - | ​ | - | ​ | ​ | 683,578 | ​ | ​ | - | ​ | - | ​ | ​ | 605,253 | ​ | ​ | - | ​ | -
Total liabilities and stockholders' equity | ​ | $ | 5,736,706 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,674,317 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,615,458 | ​ | ​ | ​ | ​ | ​
Net interest income (GAAP) | ​ | ​ | ​ | ​ | $ | 64,234 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 62,904 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 59,690 | ​ | ​
Net interest margin (GAAP) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.83 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.85 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.60
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income (TE)1 | ​ | ​ | ​ | ​ | $ | 64,570 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 63,248 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 60,044 | ​ | ​
Net interest margin (TE)1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.85 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.88 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.63
Interest bearing liabilities to earning assets | ​ | ​ | 60.75 | % | ​ | ​ | ​ | ​ | ​ | ​ | 61.19 | % | ​ | ​ | ​ | ​ | ​ | ​ | 60.81 | % | ​ | ​ | ​ | ​
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1 Represents a non-GAAP financial measure. See the discussion entitled “Reconciliation of Tax-Equivalent Non-GAAP Financial Measures” below that provides a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. Tax equivalent basis is calculated using a marginal tax rate of 21% in 2025 and 2024.

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2 Interest income from loans is shown on a tax equivalent basis, which is a non-GAAP financial measure, as discussed in the table on page 51, and includes loan fee income of $365,000 for the second quarter of 2025, loan fee income of $545,000 for the first quarter of 2025, and loan fee expense of $936,000 for the second quarter of 2024. Nonaccrual loans are included in the above-stated average balances.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Analysis of Average Balances,
Tax Equivalent Income / Expense and Rates
(Dollars in thousands - unaudited)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Six Months Ended June 30,
​ | 2025 | ​ | 2024
​ | Average | ​ | Income / | ​ | Rate | ​ | Average | ​ | Income / | ​ | Rate
​ | Balance | ​ | Expense | ​ | % | ​ | Balance | ​ | Expense | ​ | %
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest earning deposits with financial institutions | $ | 132,195 | ​ | $ | 2,772 | ​ | 4.23 | ​ | $ | 49,414 | ​ | $ | 1,235 | ​ | 5.03
Securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxable | ​ | 1,033,392 | ​ | ​ | 19,186 | ​ | 3.74 | ​ | ​ | 1,016,150 | ​ | ​ | 16,644 | ​ | 3.29
Non-taxable (TE)1 | ​ | 152,323 | ​ | ​ | 3,151 | ​ | 4.17 | ​ | ​ | 165,009 | ​ | ​ | 3,289 | ​ | 4.01
Total securities (TE)1 | ​ | 1,185,715 | ​ | ​ | 22,337 | ​ | 3.80 | ​ | ​ | 1,181,159 | ​ | ​ | 19,933 | ​ | 3.39
Dividends from FHLBC and FRBC | ​ | 19,320 | ​ | ​ | 746 | ​ | 7.79 | ​ | ​ | 29,687 | ​ | ​ | 1,219 | ​ | 8.26
Loans and loans held-for-sale 1, 2 | ​ | 3,959,866 | ​ | ​ | 123,628 | ​ | 6.30 | ​ | ​ | 3,988,941 | ​ | ​ | 124,878 | ​ | 6.30
Total interest earning assets | ​ | 5,297,096 | ​ | ​ | 149,483 | ​ | 5.69 | ​ | ​ | 5,249,201 | ​ | ​ | 147,265 | ​ | 5.64
Cash and due from banks | ​ | 50,200 | ​ | ​ | - | ​ | - | ​ | ​ | 54,410 | ​ | ​ | - | ​ | -
Allowance for credit losses on loans | ​ | (42,538) | ​ | ​ | - | ​ | - | ​ | ​ | (43,882) | ​ | ​ | - | ​ | -
Other noninterest earning assets | ​ | 400,926 | ​ | ​ | - | ​ | - | ​ | ​ | 386,362 | ​ | ​ | - | ​ | -
Total assets | $ | 5,705,684 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,646,091 | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities and Stockholders' Equity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
NOW accounts | $ | 640,904 | ​ | $ | 1,310 | ​ | 0.41 | ​ | $ | 562,184 | ​ | $ | 1,468 | ​ | 0.53
Money market accounts | ​ | 817,065 | ​ | ​ | 7,313 | ​ | 1.80 | ​ | ​ | 690,605 | ​ | ​ | 5,490 | ​ | 1.60
Savings accounts | ​ | 939,859 | ​ | ​ | 1,896 | ​ | 0.41 | ​ | ​ | 946,403 | ​ | ​ | 1,396 | ​ | 0.30
Time deposits | ​ | 710,549 | ​ | ​ | 9,337 | ​ | 2.65 | ​ | ​ | 584,584 | ​ | ​ | 9,002 | ​ | 3.10
Interest bearing deposits | ​ | 3,108,377 | ​ | ​ | 19,856 | ​ | 1.29 | ​ | ​ | 2,783,776 | ​ | ​ | 17,356 | ​ | 1.25
Securities sold under repurchase agreements | ​ | 34,977 | ​ | ​ | 124 | ​ | 0.71 | ​ | ​ | 33,746 | ​ | ​ | 169 | ​ | 1.01
Other short-term borrowings | ​ | 718 | ​ | ​ | 17 | ​ | 4.77 | ​ | ​ | 287,555 | ​ | ​ | 7,895 | ​ | 5.52
Junior subordinated debentures | ​ | 25,773 | ​ | ​ | 576 | ​ | 4.51 | ​ | ​ | 25,773 | ​ | ​ | 568 | ​ | 4.43
Subordinated debentures | ​ | 59,489 | ​ | ​ | 1,092 | ​ | 3.70 | ​ | ​ | 59,404 | ​ | ​ | 1,092 | ​ | 3.70
Total interest bearing liabilities | ​ | 3,229,334 | ​ | ​ | 21,665 | ​ | 1.35 | ​ | ​ | 3,190,254 | ​ | ​ | 27,080 | ​ | 1.71
Noninterest bearing deposits | ​ | 1,716,406 | ​ | ​ | - | ​ | - | ​ | ​ | 1,794,509 | ​ | ​ | - | ​ | -
Other liabilities | ​ | 64,966 | ​ | ​ | - | ​ | - | ​ | ​ | 64,277 | ​ | ​ | - | ​ | -
Stockholders' equity | ​ | 694,978 | ​ | ​ | - | ​ | - | ​ | ​ | 597,051 | ​ | ​ | - | ​ | -
Total liabilities and stockholders' equity | $ | 5,705,684 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,646,091 | ​ | ​ | ​ | ​ | ​
Net interest income (GAAP) | ​ | ​ | ​ | $ | 127,138 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 119,473 | ​ | ​
Net interest margin (GAAP) | ​ | ​ | ​ | ​ | ​ | ​ | 4.84 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.58
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income (TE)1 | ​ | ​ | ​ | $ | 127,818 | ​ | ​ | ​ | ​ | ​ | ​ | $ | 120,185 | ​ | ​
Net interest margin (TE)1 | ​ | ​ | ​ | ​ | ​ | ​ | 4.87 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4.60
Interest bearing liabilities to earning assets | ​ | 60.96 | % | ​ | ​ | ​ | ​ | ​ | ​ | 60.78 | % | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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1 Represents a non-GAAP financial measure. See the discussion entitled “Reconciliation of Tax-Equivalent Non-GAAP Financial Measures” below that provides a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. Tax equivalent basis is calculated using a marginal tax rate of 21% in 2025 and 2024.

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2 Interest income from loans is shown on a tax equivalent basis, which is a non-GAAP financial measure, as discussed in the table on page 51, and includes fee income of $910,000 and fee expense of $1.8 million for the six months ended June 30, 2025 and 2024, respectively. Nonaccrual loans are included in the above-stated average balances.

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Reconciliation of Tax-Equivalent (TE) Non-GAAP Financial Measures

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Net interest and dividend income (TE) and net interest income (TE) to average interest earning assets are non-GAAP measures that have been adjusted on a TE basis using a marginal rate of 21% for 2025 and 2024 to compare returns more appropriately on tax-exempt loans and securities to other earning assets. The table below provides a reconciliation of each non-GAAP (TE) measure to the GAAP equivalent for the periods indicated:

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | ​ | June 30, | ​
Net Interest Margin |  | 2025 |  | 2025 | ​ | 2024 | ​ |  | 2025 | ​ | 2024 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income (GAAP) | ​ | $ | 75,238 | ​ | $ | 73,565 | ​ | $ | 73,223 | ​ | ​ | $ | 148,803 | ​ | $ | 146,553 | ​
Taxable-equivalent adjustment: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ | ​ | 9 | ​ | ​ | 9 | ​ | ​ | 10 | ​ | ​ | ​ | 18 | ​ | ​ | 21 | ​
Securities | ​ | ​ | 327 | ​ | ​ | 335 | ​ | ​ | 344 | ​ | ​ | ​ | 662 | ​ | ​ | 691 | ​
Interest and dividend income (TE) | ​ | ​ | 75,574 | ​ | ​ | 73,909 | ​ | ​ | 73,577 | ​ | ​ | ​ | 149,483 | ​ | ​ | 147,265 | ​
Interest expense (GAAP) | ​ | ​ | 11,004 | ​ | ​ | 10,661 | ​ | ​ | 13,533 | ​ | ​ | ​ | 21,665 | ​ | ​ | 27,080 | ​
Net interest income (TE) | ​ | $ | 64,570 | ​ | $ | 63,248 | ​ | $ | 60,044 | ​ | ​ | $ | 127,818 | ​ | $ | 120,185 | ​
Net interest income (GAAP) | ​ | $ | 64,234 | ​ | $ | 62,904 | ​ | $ | 59,690 | ​ | ​ | $ | 127,138 | ​ | $ | 119,473 | ​
Average interest earning assets | ​ | $ | 5,336,339 | ​ | $ | 5,257,416 | ​ | $ | 5,216,248 | ​ | ​ | $ | 5,297,096 | ​ | $ | 5,249,201 | ​
Net interest margin (TE) | ​ | ​ | 4.85 | % | ​ | 4.88 | % | ​ | 4.63 | % | ​ | ​ | 4.87 | % | ​ | 4.60 | %
Net interest margin (GAAP) | ​ | ​ | 4.83 | % | ​ | 4.85 | % | ​ | 4.60 | % | ​ | ​ | 4.84 | % | ​ | 4.58 | %

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Noninterest Income

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Three months ended June 30, 2025 and 2024

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The following table details the major components of noninterest income for the periods presented:

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​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025 | ​
Noninterest Income | ​ | Three Months Ended | ​ | Percent Change From | ​
(Dollars in thousands) | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​
​ |  | 2025 |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
Wealth management | ​ | $ | 3,103 | ​ | $ | 3,089 | ​ | $ | 2,779 | ​ | 0.5 | ​ | 11.7 | ​
Service charges on deposits | ​ | ​ | 2,788 | ​ | ​ | 2,719 | ​ | ​ | 2,508 | ​ | 2.5 | ​ | 11.2 | ​
Residential mortgage banking revenue | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Secondary mortgage fees | ​ | ​ | 84 | ​ | ​ | 73 | ​ | ​ | 65 | ​ | 15.1 | ​ | 29.2 | ​
MSRs mark to market loss | ​ | ​ | (531) | ​ | ​ | (570) | ​ | ​ | (238) | ​ | 6.8 | ​ | (123.1) | ​
Mortgage servicing income | ​ | ​ | 472 | ​ | ​ | 480 | ​ | ​ | 513 | ​ | (1.7) | ​ | (8.0) | ​
Net gain on sales of mortgage loans | ​ | ​ | 550 | ​ | ​ | 464 | ​ | ​ | 468 | ​ | 18.5 | ​ | 17.5 | ​
Total residential mortgage banking revenue | ​ | ​ | 575 | ​ | ​ | 447 | ​ | ​ | 808 | ​ | 28.6 | ​ | (28.8) | ​
Change in cash surrender value of BOLI | ​ | ​ | 690 | ​ | ​ | 498 | ​ | ​ | 820 | ​ | 38.6 | ​ | (15.9) | ​
Death benefit realized on BOLI | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 893 | ​ | - | ​ | (100.0) | ​
Card related income | ​ | ​ | 2,716 | ​ | ​ | 2,412 | ​ | ​ | 2,577 | ​ | 12.6 | ​ | 5.4 | ​
Other income | ​ | ​ | 1,026 | ​ | ​ | 1,036 | ​ | ​ | 742 | ​ | (1.0) | ​ | 38.3 | ​
Total noninterest income | ​ | $ | 10,898 | ​ | $ | 10,201 | ​ | $ | 11,127 | ​ | 6.8 | ​ | (2.1) | ​

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Noninterest income increased $697,000, or 6.8%, in the second quarter of 2025, compared to the first quarter of 2025, and decreased $229,000, or 2.1%, compared to the second quarter of 2024. The increase from the first quarter of 2025 was primarily driven by a $304,000 increase in card related income and a $192,000 increase in the cash surrender value of BOLI due to changes in market interest rates related to our COLI investments.

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The decrease in noninterest income of $229,000 in the second quarter of 2025, compared to the second quarter of 2024, is primarily due to no death benefits realized on BOLI in 2025, compared to an $893,000 death benefit recorded in the second quarter of 2024. Also contributing to the reduction in noninterest income during the quarter was a $233,000 decrease in residential mortgage banking revenue mainly due to a $293,000 decrease in MSRs mark to market valuations. Partially offsetting the decrease in noninterest income from the prior year like quarter was a $324,000 increase in wealth management income primarily due to growth in advisory fees and estate fees, a $280,000 increase in service charges on deposits, and a $284,000 increase in other income due to growth in commercial swap fee income, as well as a real estate tax refund related to a prior year tax assessment received in the second quarter of 2025 from an OREO property.

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Six months ended June 30, 2025 and 2024

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest Income | ​ | Six Months Ended | ​ | ​
(Dollars in thousands) | ​ | June 30, | ​ | June 30, | ​ | Percent
​ |  | 2025 |  | 2024 |  | Change
Wealth management | ​ | $ | 6,192 | ​ | $ | 5,340 | ​ | 16.0
Service charges on deposits | ​ | ​ | 5,507 | ​ | ​ | 4,923 | ​ | 11.9
Residential mortgage banking revenue | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Secondary mortgage fees | ​ | ​ | 157 | ​ | ​ | 115 | ​ | 36.5
MSRs mark to market loss | ​ | ​ | (1,101) | ​ | ​ | (144) | ​ | (664.6)
Mortgage servicing income | ​ | ​ | 952 | ​ | ​ | 1,001 | ​ | (4.9)
Net gain on sales of mortgage loans | ​ | ​ | 1,014 | ​ | ​ | 782 | ​ | 29.7
Total residential mortgage banking revenue | ​ | ​ | 1,022 | ​ | ​ | 1,754 | ​ | (41.7)
Securities gains, net | ​ | ​ | - | ​ | ​ | 1 | ​ | (100.0)
Change in cash surrender value of BOLI | ​ | ​ | 1,188 | ​ | ​ | 1,992 | ​ | (40.4)
Death benefit realized on BOLI | ​ | ​ | - | ​ | ​ | 893 | ​ | (100.0)
Card related income | ​ | ​ | 5,128 | ​ | ​ | 4,953 | ​ | 3.5
Other income | ​ | ​ | 2,062 | ​ | ​ | 1,772 | ​ | 16.4
Total noninterest income | ​ | $ | 21,099 | ​ | $ | 21,628 | ​ | (2.4)

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Noninterest income decreased $529,000, or 2.4%, for the six months ended June 30, 2025, compared to the six months ended June 30, 2024. This decrease was primarily driven by a $732,000 decrease in mortgage banking revenue, comprised primarily of a $957,000 increase in MSRs mark to market losses and partially offset by a $232,000 increase in the net gain on sales of mortgage loans. In addition, the current six month period decreased due to a $804,000 decrease in the cash surrender value of BOLI due to market interest rate changes on COLI investments, and no death benefits were realized on BOLI in the second quarter of 2025, compared to an $893,000 death benefit realized on BOLI in the prior linked period. Partially offsetting these decreases was an $852,000 increase in wealth management income, a $584,000 increase in service charges on deposits, a $175,000 increase in card related income, and a $290,000 increase in other income.

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Noninterest Expense

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Three months ended June 30, 2025 and 2024

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The following table details the major components of noninterest expense for the periods presented:

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025 | ​
Noninterest Expense | ​ | Three Months Ended | ​ | Percent Change From | ​
(Dollars in thousands) | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​
​ |  | 2025 |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
Salaries | ​ | $ | 19,119 | ​ | $ | 18,804 | ​ | $ | 17,997 | ​ | 1.7 | ​ | 6.2 | ​
Officers' incentive | ​ | ​ | 2,921 | ​ | ​ | 2,799 | ​ | ​ | 1,482 | ​ | 4.4 | ​ | 97.1 | ​
Benefits and other | ​ | ​ | 4,910 | ​ | ​ | 5,390 | ​ | ​ | 3,945 | ​ | (8.9) | ​ | 24.5 | ​
Total salaries and employee benefits | ​ | ​ | 26,950 | ​ | ​ | 26,993 | ​ | ​ | 23,424 | ​ | (0.2) | ​ | 15.1 | ​
Occupancy, furniture and equipment expense | ​ | ​ | 4,477 | ​ | ​ | 4,548 | ​ | ​ | 3,899 | ​ | (1.6) | ​ | 14.8 | ​
Computer and data processing | ​ | ​ | 2,692 | ​ | ​ | 2,348 | ​ | ​ | 2,184 | ​ | 14.7 | ​ | 23.3 | ​
FDIC insurance | ​ | ​ | 642 | ​ | ​ | 628 | ​ | ​ | 616 | ​ | 2.2 | ​ | 4.2 | ​
Net teller & bill paying | ​ | ​ | 670 | ​ | ​ | 658 | ​ | ​ | 578 | ​ | 1.8 | ​ | 15.9 | ​
General bank insurance | ​ | ​ | 328 | ​ | ​ | 330 | ​ | ​ | 312 | ​ | (0.6) | ​ | 5.1 | ​
Amortization of core deposit intangible asset | ​ | ​ | 1,022 | ​ | ​ | 1,037 | ​ | ​ | 574 | ​ | (1.4) | ​ | 78.0 | ​
Advertising expense | ​ | ​ | 320 | ​ | ​ | 167 | ​ | ​ | 472 | ​ | 91.6 | ​ | (32.2) | ​
Card related expense | ​ | ​ | 1,489 | ​ | ​ | 1,380 | ​ | ​ | 1,323 | ​ | 7.9 | ​ | 12.5 | ​
Legal fees | ​ | ​ | 388 | ​ | ​ | 472 | ​ | ​ | 238 | ​ | (17.8) | ​ | 63.0 | ​
Consulting & management fees | ​ | ​ | 527 | ​ | ​ | 426 | ​ | ​ | 797 | ​ | 23.7 | ​ | (33.9) | ​
Other real estate owned expense, net | ​ | ​ | 35 | ​ | ​ | 1,873 | ​ | ​ | (87) | ​ | (98.1) | ​ | N/M | ​
Other expense | ​ | ​ | 3,879 | ​ | ​ | 3,645 | ​ | ​ | 3,547 | ​ | 6.4 | ​ | 9.4 | ​
Total noninterest expense | ​ | $ | 43,419 | ​ | $ | 44,505 | ​ | $ | 37,877 | ​ | (2.4) | ​ | 14.6 | ​
Efficiency ratio (GAAP)1 | ​ | ​ | 55.99 | % | ​ | 56.46 | % | ​ | 53.29 | % | ​ | ​ | ​ | ​
Adjusted efficiency ratio (non-GAAP)2 | ​ | ​ | 54.54 | % | ​ | 55.48 | % | ​ | 52.68 | % | ​ | ​ | ​ | ​

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N/M – Not meaningful.

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1 The efficiency ratio shown in the table above is a GAAP financial measure calculated as noninterest expense, excluding amortization of core deposits and OREO expenses, divided by the sum of net interest income and total noninterest income less net gains or losses on securities, death benefit realized on BOLI, as applicable, and mark to market gains or losses on MSRs.

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2 The adjusted efficiency ratio shown in the table above is a non-GAAP financial measure calculated as noninterest expense, excluding amortization of core deposits, OREO expenses, acquisition expense, net of gains or losses on branch sales, as applicable, divided by the sum of net interest income on a fully tax equivalent basis, total noninterest income less net gains or losses on securities, death benefit realized on BOLI, as applicable, mark to market gains or losses on MSRs, and includes a tax equivalent adjustment on the change in cash surrender value of BOLI. See the discussion entitled “Non-GAAP Financial Measures” above and the table on page 55 that provides a reconciliation of this non-GAAP financial measure to the most comparable GAAP equivalent.

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Noninterest expense for the second quarter of 2025 decreased $1.1 million, or 2.4%, compared to the first quarter of 2025, and increased $5.5 million, or 14.6%, compared to the second quarter of 2024. The decrease in the second quarter of 2025, compared to the first quarter of 2025, was attributable to a $1.8 million decrease in other real estate owned (“OREO”) expense, net, as the second quarter of 2025 reflects a $76,000 gain on the sale of OREO compared to a $236,000 net loss on the sale of OREO properties in the first quarter of 2025, as well as a $297,000 decrease in OREO valuation expenses and a $1.2 million decrease in other OREO expenses due to lower operating costs driven by the sale of a large OREO property in the first quarter of 2025. Partially offsetting the decrease in noninterest expense over the prior linked quarter was a $344,000 increase in computer and data processing due to Bancorp Financial acquisition-related costs, a $153,000 increase in advertising expenses mainly due to advertising and art production costs for a brand awareness campaign, and a $234,000 increase in other expenses primarily due to filing and printing fees for the annual proxy and for SEC filings related to the Bancorp Financial merger.

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The year over year increase in noninterest expense is primarily attributable to a $3.5 million increase in salaries and employee benefits, primarily due to increases in annual base salary rates, officers’ incentives, and restricted stock units expense in the second quarter of 2025. Also contributing to the increase was a $578,000 increase in occupancy, furniture and equipment, a $508,000 increase in computer and data processing expenses, a $448,000 increase in core deposit intangible, and a $332,000 increase in other expense primarily due to the effect of the FRME branches purchased in December 2024 as well as acquisition-related costs associated with our merger with Bancorp Financial. Partially offsetting the year over year increase was a $270,000 decrease in consulting & management fees, as the prior year included consulting costs for a compliance item.

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Six months ended June 30, 2025 and 2024

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest Expense | ​ | Six Months Ended | ​ | ​
(Dollars in thousands) | ​ | June 30, | ​ | June 30, | ​ | Percent
​ |  | 2025 |  | 2024 |  | Change
Salaries | ​ | $ | 37,923 | ​ | $ | 35,644 | ​ | 6.4
Officers' incentive | ​ | ​ | 5,720 | ​ | ​ | 3,630 | ​ | 57.6
Benefits and other | ​ | ​ | 10,300 | ​ | ​ | 8,462 | ​ | 21.7
Total salaries and employee benefits | ​ | ​ | 53,943 | ​ | ​ | 47,736 | ​ | 13.0
Occupancy, furniture and equipment expense | ​ | ​ | 9,025 | ​ | ​ | 7,826 | ​ | 15.3
Computer and data processing | ​ | ​ | 5,040 | ​ | ​ | 4,439 | ​ | 13.5
FDIC insurance | ​ | ​ | 1,270 | ​ | ​ | 1,283 | ​ | (1.0)
Net teller & bill paying | ​ | ​ | 1,328 | ​ | ​ | 1,099 | ​ | 20.8
General bank insurance | ​ | ​ | 658 | ​ | ​ | 621 | ​ | 6.0
Amortization of core deposit intangible asset | ​ | ​ | 2,059 | ​ | ​ | 1,154 | ​ | 78.4
Advertising expense | ​ | ​ | 487 | ​ | ​ | 664 | ​ | (26.7)
Card related expense | ​ | ​ | 2,869 | ​ | ​ | 2,600 | ​ | 10.3
Legal fees | ​ | ​ | 860 | ​ | ​ | 464 | ​ | 85.3
Consulting & management fees | ​ | ​ | 953 | ​ | ​ | 1,133 | ​ | (15.9)
Other real estate owned expense, net | ​ | ​ | 1,908 | ​ | ​ | (41) | ​ | N/M
Other expense | ​ | ​ | 7,524 | ​ | ​ | 7,140 | ​ | 5.4
Total noninterest expense | ​ | $ | 87,924 | ​ | $ | 76,118 | ​ | 15.5
Efficiency ratio (GAAP)1 | ​ | ​ | 56.22 | % | ​ | 53.44 | % | ​
Adjusted efficiency ratio (non-GAAP)2 | ​ | ​ | 55.01 | % | ​ | 52.88 | % | ​

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N/M – Not meaningful.

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1 The efficiency ratio shown in the table above is a GAAP financial measure calculated as noninterest expense, excluding amortization of core deposits and OREO expenses, divided by the sum of net interest income and total noninterest income less net gains or losses on securities, and mark to market gains or losses on MSRs.

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2 The adjusted efficiency ratio shown in the table above is a non-GAAP financial measure calculated as noninterest expense, excluding amortization of core deposits, OREO expenses, and net gains on branch sales, divided by the sum of net interest income on a fully tax equivalent basis, total noninterest income less net gains or losses on securities, death benefits realized on BOLI, mark to market gains or losses on MSRs, and includes a tax equivalent adjustment on the change in cash surrender value of BOLI. See the discussion entitled “Non-GAAP Financial Measures” above and the table on page 55 that provides a reconciliation of this non-GAAP financial measure to the most comparable GAAP equivalent.

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Noninterest expense for the six months ended June 30, 2025, increased $11.8 million, or 15.5%, compared to the six months ended June 30, 2024, primarily due to a $6.2 million increase in salaries and employee benefits due to forty additional full-time equivalent employees in 2025 related to the FRME branch transaction in December 2024, higher annual base salary rates, restricted stock expense, and deferred employee compensation due to market interest rate changes. Occupancy, furniture and equipment increased $1.2 million and the amortization of core deposit intangibles increased $905,000, both of which were primarily due to the FRME transaction . Computer and data processing increased $601,000, legal fees increased $396,000, and other expense increased $384,000 due to Bancorp Financial acquisition-related costs. Other increases year over year include a $1.9 million increase in other real estate owned, net, related to operating costs, closing costs, and valuation adjustments as we liquidated multiple OREO properties in the six months ended June 30, 2025.

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Reconciliation of Adjusted Efficiency Ratio Non-GAAP Financial Measures

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | GAAP | ​ | Non-GAAP | ​
​ | ​ | ​ | Three Months Ended | ​ | ​ | Three Months Ended | ​
​ | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | June 30, | ​ | March 31, | ​ | June 30, | ​
​ | ​ | 2025 | ​ | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2025 | ​ | 2024 | ​
Efficiency Ratio / Adjusted Efficiency Ratio | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest expense | ​ | $ | 43,419 | ​ | $ | 44,505 | ​ | $ | 37,877 | ​ | $ | 43,419 | ​ | $ | 44,505 | ​ | $ | 37,877 | ​
Less amortization of core deposit | ​ | ​ | 1,022 | ​ | ​ | 1,037 | ​ | ​ | 574 | ​ | ​ | 1,022 | ​ | ​ | 1,037 | ​ | ​ | 574 | ​
Less other real estate expense, net | ​ | ​ | 35 | ​ | ​ | 1,873 | ​ | ​ | (87) | ​ | ​ | 35 | ​ | ​ | 1,873 | ​ | ​ | (87) | ​
Less merger related costs, net of losses on branch sales | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | 810 | ​ | ​ | 454 | ​ | ​ | - | ​
Noninterest expense less adjustments | ​ | $ | 42,362 | ​ | $ | 41,595 | ​ | $ | 37,390 | ​ | $ | 41,552 | ​ | $ | 41,141 | ​ | $ | 37,390 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income | ​ | $ | 64,234 | ​ | $ | 62,904 | ​ | $ | 59,690 | ​ | $ | 64,234 | ​ | $ | 62,904 | ​ | $ | 59,690 | ​
Taxable-equivalent adjustment: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | 9 | ​ | ​ | 9 | ​ | ​ | 10 | ​
Securities | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | 327 | ​ | ​ | 335 | ​ | ​ | 344 | ​
Net interest income including adjustments | ​ | ​ | 64,234 | ​ | ​ | 62,904 | ​ | ​ | 59,690 | ​ | ​ | 64,570 | ​ | ​ | 63,248 | ​ | ​ | 60,044 | ​
Noninterest income | ​ | ​ | 10,898 | ​ | ​ | 10,201 | ​ | ​ | 11,127 | ​ | ​ | 10,898 | ​ | ​ | 10,201 | ​ | ​ | 11,127 | ​
Less death benefit related to BOLI | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 893 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 893 | ​
Less MSRs mark to market losses | ​ | ​ | (531) | ​ | ​ | (570) | ​ | ​ | (238) | ​ | ​ | (531) | ​ | ​ | (570) | ​ | ​ | (238) | ​
Taxable-equivalent adjustment: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in cash surrender value of BOLI | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | 184 | ​ | ​ | 132 | ​ | ​ | 456 | ​
Noninterest income including adjustments | ​ | ​ | 11,429 | ​ | ​ | 10,771 | ​ | ​ | 10,472 | ​ | ​ | 11,613 | ​ | ​ | 10,903 | ​ | ​ | 10,928 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income including adjustments plus noninterest income including adjustments | ​ | $ | 75,663 | ​ | $ | 73,675 | ​ | $ | 70,162 | ​ | $ | 76,183 | ​ | $ | 74,151 | ​ | $ | 70,972 | ​
Efficiency ratio / Adjusted efficiency ratio | ​ | ​ | 55.99 | % | ​ | 56.46 | % | ​ | 53.29 | % | ​ | 54.54 | % | ​ | 55.48 | % | ​ | 52.68 | %

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N/A - not applicable

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | GAAP | ​ | Non-GAAP
​ | ​ | ​ | Six Months Ended | ​ | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30, | ​ | ​ | June 30, | ​ | June 30, | ​
​ | ​ | 2025 | ​ | 2024 | ​ | ​ | 2025 | ​ | 2024 | ​
Efficiency Ratio / Adjusted Efficiency Ratio (1) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Noninterest expense | ​ | $ | 87,924 | ​ | $ | 76,118 | ​ | ​ | $ | 87,924 | ​ | $ | 76,118 | ​
Less amortization of core deposit intangible | ​ | ​ | 2,059 | ​ | ​ | 1,154 | ​ | ​ | ​ | 2,059 | ​ | ​ | 1,154 | ​
Less other real estate expense, net | ​ | ​ | 1,908 | ​ | ​ | (41) | ​ | ​ | ​ | 1,908 | ​ | ​ | (41) | ​
Less merger related costs, net of losses on branch sales | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | ​ | 1,264 | ​ | ​ | - | ​
Noninterest expense less adjustments | ​ | $ | 83,957 | ​ | $ | 75,005 | ​ | ​ | $ | 82,693 | ​ | $ | 75,005 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income | ​ | $ | 127,138 | ​ | $ | 119,473 | ​ | ​ | $ | 127,138 | ​ | $ | 119,473 | ​
Taxable-equivalent adjustment: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | ​ | 18 | ​ | ​ | 21 | ​
Securities | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | ​ | 662 | ​ | ​ | 691 | ​
Net interest income including adjustments | ​ | ​ | 127,138 | ​ | ​ | 119,473 | ​ | ​ | ​ | 127,818 | ​ | ​ | 120,185 | ​
Noninterest income | ​ | ​ | 21,099 | ​ | ​ | 21,628 | ​ | ​ | ​ | 21,099 | ​ | ​ | 21,628 | ​
Less death benefit related to BOLI | ​ | ​ | - | ​ | ​ | 893 | ​ | ​ | ​ | - | ​ | ​ | 893 | ​
Less securities losses, net | ​ | ​ | - | ​ | ​ | 1 | ​ | ​ | ​ | - | ​ | ​ | 1 | ​
Less MSRs mark to market losses | ​ | ​ | (1,101) | ​ | ​ | (144) | ​ | ​ | ​ | (1,101) | ​ | ​ | (144) | ​
Taxable-equivalent adjustment: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in cash surrender value of BOLI | ​ | ​ | N/A | ​ | ​ | N/A | ​ | ​ | ​ | 316 | ​ | ​ | 767 | ​
Noninterest income including adjustments | ​ | ​ | 22,200 | ​ | ​ | 20,878 | ​ | ​ | ​ | 22,516 | ​ | ​ | 21,645 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net interest income including adjustments plus noninterest income including adjustments | ​ | $ | 149,338 | ​ | $ | 140,351 | ​ | ​ | $ | 150,334 | ​ | $ | 141,830 | ​
Efficiency ratio / Adjusted efficiency ratio | ​ | ​ | 56.22 | % | ​ | 53.44 | % | ​ | ​ | 55.01 | % | ​ | 52.88 | %

​

N/A - not applicable

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Income Taxes

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We recorded income tax expense of $7.4 million for the second quarter of 2025 on $29.2 million of pretax income, compared to income tax expense of $6.4 million on $26.2 million of pretax income in the first quarter of 2025, and income tax expense of $7.3 million on $29.2 million of pretax income in the second quarter of 2024. Our effective tax rate was 25.3% in the second quarter of 2025, 24.3% for the first quarter of 2025, and 25.0% for the second quarter of 2024.

​

Income tax expense reflected all relevant statutory tax rates and GAAP accounting. There were no significant changes in our ability to utilize our deferred tax assets during the quarter ended June 30, 2025. We had no valuation reserve on the deferred tax assets as of June 30, 2025.

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Recent Developments – Tax Legislation

​

On July 4, 2025, the One Big Beautiful Bill Act (“OBBBA”) was signed into law. The OBBBA extends or makes permanent a number of provisions originally enacted in the 2017 Tax Cuts and Jobs Act and introduces new items affecting both individuals and businesses. Topic 740, Income Taxes, of the FASB Accounting Standards Codification requires the effects of newly enacted tax law to be recognized in the period of enactment. Because enactment occurred after the quarter-end date of June 30, 2025, we are evaluating OBBBA’s impact on our deferred tax assets and liabilities, effective tax rate, and tax-related processes (e.g., payroll reporting for qualifying wage items). Based on preliminary analysis, we do not currently expect the OBBBA to have a material impact on our 2025 estimated annual effective tax rate or on our consolidated financial statements, but our evaluation is ongoing.

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Financial Condition

​

Total assets increased $51.9 million to $5.70 billion at June 30, 2025, from $5.65 billion at December 31, 2024, due primarily to the increase of $42.4 million in cash, the increase of $16.0 million in securities available-for-sale, and the increase of $17.3 million in total loans. These increases are partially offset by a decrease in OREO of $15.1 million and a decrease in deferred tax assets of $6.2 million. We continue to actively assess potential investment opportunities to utilize our excess liquidity. Total deposits were $4.80 billion at June 30, 2025, an increase of $29.7 million from December 31, 2024.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
Securities | ​ | As of | ​ | Percent Change From
(Dollars in thousands) | ​ | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ |  | 2025 |  | 2024 |  | 2024 |  | 2024 |  | 2024
Securities available-for-sale, at fair value | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasuries | ​ | $ | 190,446 | ​ | $ | 194,143 | ​ | $ | 191,274 | ​ | (1.9) | ​ | (0.4)
U.S. government agencies | ​ | ​ | 38,141 | ​ | ​ | 37,814 | ​ | ​ | 37,298 | ​ | 0.9 | ​ | 2.3
U.S. government agencies mortgage-backed | ​ | ​ | 96,083 | ​ | ​ | 100,277 | ​ | ​ | 96,872 | ​ | (4.2) | ​ | (0.8)
States and political subdivisions | ​ | ​ | 208,814 | ​ | ​ | 215,456 | ​ | ​ | 220,265 | ​ | (3.1) | ​ | (5.2)
Collateralized mortgage obligations | ​ | ​ | 395,014 | ​ | ​ | 368,616 | ​ | ​ | 386,055 | ​ | 7.2 | ​ | 2.3
Asset-backed securities | ​ | ​ | 48,119 | ​ | ​ | 62,303 | ​ | ​ | 64,877 | ​ | (22.8) | ​ | (25.8)
Collateralized loan obligations | ​ | ​ | 201,071 | ​ | ​ | 183,092 | ​ | ​ | 177,020 | ​ | 9.8 | ​ | 13.6
Total securities | ​ | $ | 1,177,688 | ​ | $ | 1,161,701 | ​ | $ | 1,173,661 | ​ | 1.4 | ​ | 0.3
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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Securities available-for-sale increased $16.0 million as of June 30, 2025, compared to December 31, 2024, and increased $4.0 million compared to June 30, 2024. The increase in the portfolio during year 2025 was driven by $162.5 million in purchases and a $13.9 million decrease to unrealized losses on securities available-for-sale, partially offset by paydowns totaling $83.8 million along with maturities and calls totaling $75.8 million. We continue to position the portfolio in higher credit quality, shorter duration securities with an appropriate mix of fixed- and floating-rate exposures.

​

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
Loans | As of | ​ | Percent Change From
(Dollars in thousands) | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ | 2025 | ​ | 2024 | ​ | 2024 | ​ | 2024 |  | 2024
Commercial | $ | 718,927 | ​ | $ | 800,476 | ​ | $ | 809,443 | ​ | (10.2) | ​ | (11.2)
Leases | ​ | 524,513 | ​ | ​ | 491,748 | ​ | ​ | 452,957 | ​ | 6.7 | ​ | 15.8
Commercial real estate – investor | ​ | 1,118,782 | ​ | ​ | 1,078,829 | ​ | ​ | 1,014,345 | ​ | 3.7 | ​ | 10.3
Commercial real estate – owner occupied | ​ | 652,449 | ​ | ​ | 683,283 | ​ | ​ | 745,938 | ​ | (4.5) | ​ | (12.5)
Construction | ​ | 251,692 | ​ | ​ | 201,716 | ​ | ​ | 185,634 | ​ | 24.8 | ​ | 35.6
Residential real estate – investor | ​ | 50,976 | ​ | ​ | 49,598 | ​ | ​ | 50,371 | ​ | 2.8 | ​ | 1.2
Residential real estate – owner occupied | ​ | 220,672 | ​ | ​ | 206,949 | ​ | ​ | 218,974 | ​ | 6.6 | ​ | 0.8
Multifamily | ​ | 333,787 | ​ | ​ | 351,325 | ​ | ​ | 388,743 | ​ | (5.0) | ​ | (14.1)
HELOC | ​ | 111,265 | ​ | ​ | 103,388 | ​ | ​ | 99,037 | ​ | 7.6 | ​ | 12.3
Other 1 | ​ | 15,604 | ​ | ​ | 14,024 | ​ | ​ | 11,153 | ​ | 11.3 | ​ | 39.9
Total loans | $ | 3,998,667 | ​ | $ | 3,981,336 | ​ | $ | 3,976,595 | ​ | 0.4 | ​ | 0.6

​

1 The “Other” segment includes consumer loans and overdrafts.

​

Total loans were $4.00 billion as of June 30, 2025, an increase of $17.3 million from December 31, 2024. The increase in total loans in the first six months of 2025, compared to December 31, 2024, was due primarily to increased originations, net of paydowns, within leases of $32.8 million, commercial real estate - investor of $40.0 million, and construction of $50.0 million, partially offset by net decreases in commercial of $81.5 million, commercial real estate – owner occupied of $30.8 million, and multifamily of $17.5 million. Total loans increased $22.1 million compared to June 30, 2024, primarily due to originations, net of paydowns, within leases of $71.6 million, commercial real estate – investor of $104.4 million, and construction of $66.1 million, partially offset by net decreases in commercial of $90.5 million, commercial real estate – owner occupied of $93.5 million, and multifamily of $55.0 million. As required by CECL, the balance (or amortized cost basis) of purchased credit deteriorated loans, or PCD loans (discussed below) is carried on a gross basis, rather than net of the associated credit loss estimate, and the expected credit losses for PCD loans are estimated and separately recognized as part of the allowance for credit losses, or ACL.

​

The quality of our loan portfolio is impacted not only by our credit decisions but also by the economic health of the communities in which we operate. Since we are located in a corridor with significant open space and undeveloped real estate, real estate lending (including commercial real estate, construction, residential, multifamily, and HELOCs) has been and continues to be a sizeable portion of our portfolio. These categories comprised 68.5% of the portfolio as of June 30, 2025, compared to 67.2% of the portfolio as of December 31, 2024. At June 30, 2025, our outstanding commercial real estate loans and undrawn commercial real estate commitments, excluding owner occupied real estate, were equal to 267.7% of our Tier 1 capital plus allowance for credit losses, a decrease from 273.3% at December 31, 2024. We continue to oversee and seek to manage our loan portfolio in accordance with interagency guidance on risk management.

​

Asset Quality

Nonperforming loans consist of nonaccrual loans and loans 90 days or greater past due. Nonperforming loans increased by $2.0 million to $32.2 million at June 30, 2025, from $30.3 million at December 31, 2024, and decreased by $14.6 million from $46.9 million at June 30, 2024. Purchased credit deteriorated loans, or PCD loans, are purchased loans that, as of the date of acquisition, we determined had experienced a more-than-insignificant deterioration in credit quality since origination. PCD loans and their related deferred loan costs are included in our nonperforming loan disclosures, if such loans otherwise meet the definition of a nonperforming loan. Management continues to carefully monitor loans considered to be in a classified status. Nonperforming loans as a percent of total loans were 0.8% as of both June 30, 2025, and December 31, 2024, and 1.2% as of June 30, 2024. The distribution of our nonperforming loans is shown in the following table.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025 | ​
Nonperforming Loans | As of | ​ | Percent Change From | ​
(Dollars in thousands) | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30, | ​
​ | 2025 | ​ | 2024 | ​ | 2024 | ​ | 2024 | ​ | 2024 | ​
Commercial | $ | 11,120 | ​ | $ | 6,988 | ​ | $ | 2,654 | ​ | 59.1 | ​ | ​ | 319.0 | ​ | ​
Leases | ​ | 1,346 | ​ | ​ | 523 | ​ | ​ | 284 | ​ | 157.4 | ​ | ​ | 373.9 | ​ | ​
Commercial real estate – investor | ​ | 1,645 | ​ | ​ | 1,981 | ​ | ​ | 9,954 | ​ | (17.0) | ​ | ​ | (83.5) | ​ | ​
Commercial real estate – owner occupied | ​ | 13,610 | ​ | ​ | 10,604 | ​ | ​ | 22,091 | ​ | 28.3 | ​ | ​ | (38.4) | ​ | ​
Construction | ​ | 344 | ​ | ​ | 5,800 | ​ | ​ | 5,740 | ​ | (94.1) | ​ | ​ | (94.0) | ​ | ​
Residential real estate – investor | ​ | 704 | ​ | ​ | 1,158 | ​ | ​ | 1,280 | ​ | (39.2) | ​ | ​ | (45.0) | ​ | ​
Residential real estate – owner occupied | ​ | 1,515 | ​ | ​ | 1,653 | ​ | ​ | 2,599 | ​ | (8.3) | ​ | ​ | (41.7) | ​ | ​
Multifamily | ​ | 1,099 | ​ | ​ | 1,165 | ​ | ​ | 1,395 | ​ | (5.7) | ​ | ​ | (21.2) | ​ | ​
HELOC | ​ | 860 | ​ | ​ | 405 | ​ | ​ | 869 | ​ | 112.3 | ​ | ​ | (1.0) | ​ | ​
Other 1 | ​ | 4 | ​ | ​ | 10 | ​ | ​ | - | ​ | (60.0) | ​ | ​ | N/M | ​ | ​
Total nonperforming loans | $ | 32,247 | ​ | $ | 30,287 | ​ | $ | 46,866 | ​ | 6.5 | ​ | ​ | (31.2) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

N/M – Not meaningful.

​

1 The “Other” segment includes consumer loans and overdrafts.

​

The components of our nonperforming assets are shown in the following table.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
Nonperforming Assets | ​ | As of | ​ | Percent Change From
(Dollars in thousands) | ​ | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ |  | 2025 |  | 2024 |  | 2024 |  | 2024 | ​ | 2024
Nonaccrual loans | ​ | $ | 31,902 | ​ | $ | 28,851 | ​ | $ | 41,957 | ​ | 10.6 | ​ | (24.0)
Loans past due 90 days or more and still accruing interest | ​ |  | 345 | ​ |  | 1,436 | ​ |  | 4,909 | ​ | (76.0) | ​ | (93.0)
Total nonperforming loans | ​ |  | 32,247 | ​ |  | 30,287 | ​ |  | 46,866 | ​ | 6.5 | ​ | (31.2)
Other real estate owned | ​ |  | 6,486 | ​ |  | 21,617 | ​ |  | 6,920 | ​ | (70.0) | ​ | (6.3)
Repossessed Assets 1 | ​ |  | 234 | ​ |  | 484 | ​ |  | - | ​ | (51.7) | ​ | N/M
Total nonperforming assets | ​ | $ | 38,967 | ​ | $ | 52,388 | ​ | $ | 53,786 | ​ | (25.6) | ​ | (27.6)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
30-89 days past due loans and still accruing interest | ​ | $ | 14,652 | ​ | $ | 11,702 | ​ | $ | 16,728 | ​ | ​ | ​ | ​
Nonaccrual loans to total loans | ​ | ​ | 0.8 | % | ​ | 0.7 | % | ​ | 1.1 | % | ​ | ​ | ​
Nonperforming loans to total loans | ​ | ​ | 0.8 | % | ​ | 0.8 | % | ​ | 1.2 | % | ​ | ​ | ​
Nonperforming assets to total loans plus OREO and repossessed assets | ​ | ​ | 1.0 | % | ​ | 1.3 | % | ​ | 1.4 | % | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for credit losses | ​ | $ | 42,990 | ​ | $ | 43,619 | ​ | $ | 42,269 | ​ | ​ | ​ | ​
Allowance for credit losses to total loans | ​ | ​ | 1.1 | % | ​ | 1.1 | % | ​ | 1.1 | % | ​ | ​ | ​
Allowance for credit losses to nonaccrual loans | ​ | ​ | 134.8 | % | ​ | 151.2 | % | ​ | 100.7 | % | ​ | ​ | ​

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N/M – Not meaningful.

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1 Repossessed assets are reported within other assets.

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Loan charge-offs, net of recoveries, for the second quarter of 2025, prior linked quarter and year over year quarter are shown in the following table.

​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loan Charge–offs, Net of Recoveries | Three Months Ended
(Dollars in thousands) | June 30, | ​ | % of | ​ | March 31, | ​ | % of | ​ | June 30, | ​ | % of
​ | 2025 | ​ | Total1 | ​ | 2025 | ​ | Total1 | ​ | 2024 | ​ | Total1
Commercial | $ | 1,093 | ​ | 139.2 | ​ | $ | 3,414 | ​ | 78.4 | ​ | $ | (19) | ​ | (0.3)
Leases | ​ | (3) | ​ | (0.4) | ​ | ​ | 93 | ​ | 2.1 | ​ | ​ | 81 | ​ | 1.4
Commercial real estate – investor | ​ | (14) | ​ | (1.8) | ​ | ​ | (14) | ​ | (0.3) | ​ | ​ | 4,560 | ​ | 78.7
Commercial real estate – owner occupied | ​ | (1) | ​ | (0.1) | ​ | ​ | 39 | ​ | 0.9 | ​ | ​ | 1,162 | ​ | 20.1
Construction | ​ | (337) | ​ | (42.9) | ​ | ​ | 821 | ​ | 18.9 | ​ | ​ | - | ​ | -
Residential real estate – investor | ​ | (2) | ​ | (0.3) | ​ | ​ | (2) | ​ | - | ​ | ​ | (3) | ​ | (0.1)
Residential real estate – owner occupied | ​ | (8) | ​ | (1.0) | ​ | ​ | (30) | ​ | (0.7) | ​ | ​ | (9) | ​ | (0.2)
Multifamily | ​ | - | ​ | - | ​ | ​ | - | ​ | - | ​ | ​ | - | ​ | -
HELOC | ​ | (10) | ​ | (1.3) | ​ | ​ | (12) | ​ | (0.3) | ​ | ​ | (15) | ​ | (0.3)
Other 2 | ​ | 67 | ​ | 8.6 | ​ | ​ | 44 | ​ | 1.0 | ​ | ​ | 37 | ​ | 0.7
Net charge–offs (recoveries) | $ | 785 | ​ | 100.0 | ​ | $ | 4,353 | ​ | 100.0 | ​ | $ | 5,794 | ​ | 100.0
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

1 Represents the percentage of net charge-offs attributable to each category of loans.

2 The “Other” segment includes consumer and overdrafts.

​

Net charge offs, reported in the above table, reflect continuing management attention to credit quality and remediation efforts. The net charge offs for the second quarter of 2025 were primarily due to a $1.1 million charge off on a large commercial loan. We have continued our conservative loan valuations and aggressive recovery efforts on prior charge-offs.

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Classified loans include nonaccrual loans and accruing substandard and doubtful loans. Classified assets include classified loans, OREO, and repossessed assets. Loans classified as substandard are inadequately protected by either the current net worth and ability to meet payment obligations of the obligor, or by the collateral pledged to secure the loan, if any. These loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt and carry the distinct possibility that we will sustain some loss if deficiencies remain uncorrected. Loans classified as doubtful have all the weaknesses inherent as those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable.

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The following table shows classified assets by segment for the following periods.

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​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
Classified Assets | As of | ​ | Percent Change From
(Dollars in thousands) | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ | 2025 | ​ | 2024 | ​ | 2024 | ​ | 2024 | ​ | 2024
Commercial | $ | 23,354 | ​ | $ | 24,748 | ​ | $ | 19,142 | ​ | (5.6) | ​ | ​ | 22.0 | ​
Leases | ​ | 1,346 | ​ | ​ | 523 | ​ | ​ | 284 | ​ | 157.4 | ​ | ​ | 373.9 | ​
Commercial real estate – investor | ​ | 14,752 | ​ | ​ | 14,489 | ​ | ​ | 36,939 | ​ | 1.8 | ​ | ​ | (60.1) | ​
Commercial real estate – owner occupied | ​ | 51,335 | ​ | ​ | 27,619 | ​ | ​ | 48,387 | ​ | 85.9 | ​ | ​ | 6.1 | ​
Construction | ​ | 1,624 | ​ | ​ | 19,351 | ​ | ​ | 5,740 | ​ | (91.6) | ​ | ​ | (71.7) | ​
Residential real estate – investor | ​ | 1,201 | ​ | ​ | 1,690 | ​ | ​ | 1,343 | ​ | (28.9) | ​ | ​ | (10.6) | ​
Residential real estate – owner occupied | ​ | 1,707 | ​ | ​ | 1,851 | ​ | ​ | 2,734 | ​ | (7.8) | ​ | ​ | (37.6) | ​
Multifamily | ​ | 1,099 | ​ | ​ | 1,165 | ​ | ​ | 6,810 | ​ | (5.7) | ​ | ​ | (83.9) | ​
HELOC | ​ | 1,180 | ​ | ​ | 547 | ​ | ​ | 1,025 | ​ | 115.7 | ​ | ​ | 15.1 | ​
Other | ​ | 22 | ​ | ​ | 10 | ​ | ​ | 1 | ​ | 120.0 | ​ | ​ | N/M | ​
Total classified loans | ​ | 97,620 | ​ | ​ | 91,993 | ​ | ​ | 122,405 | ​ | 6.1 | ​ | ​ | (20.2) | ​
Other real estate owned | ​ | 6,486 | ​ | ​ | 21,617 | ​ | ​ | 6,920 | ​ | (70.0) | ​ | ​ | (6.3) | ​
Repossessed Assets 1 | ​ | 234 | ​ | ​ | 484 | ​ | ​ | - | ​ | (51.7) | ​ | ​ | N/M | ​
Total classified assets | $ | 104,340 | ​ | $ | 114,094 | ​ | $ | 129,325 | ​ | (8.5) | ​ | ​ | (19.3) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

N/M - Not meaningful

1 Repossessed assets are reported within other assets.

​

Total classified loans increased $5.6 million and classified assets decreased $9.8 million as of June 30, 2025, from December 31, 2024, respectively. The increase in classified loans since December 31, 2024, is due to additions to classified loans of $36.5 million, offset by outflows of $30.9 million which consisted of $11.9 million of loans paid off, $6.6 million of classified loans upgraded, $5.9 million of principal reductions through payments and partial charge offs, $1.5 million of loans charged off, and $5.0 million transferred into OREO. Classified assets decreased primarily due to the OREO outflows of $19.5 million on four OREO sales during the first six months of 2025. The $25.0 million decrease in classified assets compared to June 30, 2024, is primarily due to a classified loan decrease of $24.8 million. Classified loans since June 30, 2024, had outflows of $114.4 million which consisted of $41.9 million of loans paid off, $33.6 million of classified loans upgraded, $1.6 million of loans charged off, $18.8 million of net principal reductions and partial charge offs, and $19.2 million transferred to OREO. The outflows are offset by additions of $89.6 million of loans from June 30, 2024. Management monitors a ratio of classified assets to the sum of Bank Tier 1 capital and the ACL on loans as another measure of overall change in loan related asset quality, which is referred to as the “classified assets ratio.” The classified assets ratio was 14.91% for the period ended June 30, 2025, compared to 17.45% as of December 31, 2024, and 18.98% as of June 30, 2024.

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Allowance for Credit Losses on Loans

​

The provision for credit losses, which includes a provision for losses on unfunded commitments, is a charge to earnings to maintain the allowance for credit losses (“ACL”) at a level consistent with management’s assessment of expected losses in the loan portfolio at the balance sheet date.

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At June 30, 2025, our ACL on loans totaled $43.0 million, and our ACL on unfunded commitments, included in other liabilities, totaled $2.3 million. In the second quarter of 2025, we recorded provision expense on loans of $2.2 million, primarily due to credit migration to special mention or worse in commercial and commercial real estate segments, which led to higher loss rates in the pooled loan segments. One large commercial charge off in the amount of $1.1 million makes up the majority of second quarter total. This amount was already reserved for as of March 31, 2025, as a specific allocation. Further, we recorded a $277,000 provision on unfunded commitments, primarily due to an adjustment of historical benchmark assumptions, such as funding rates and the period used to forecast those rates, within the ACL calculation. These adjustments resulted in a $2.5 million net impact to the provision for credit losses for the second quarter of 2025.

Management estimates the amount of provision required on a quarterly basis and records the appropriate provision expense, or release of expense, to maintain an adequate reserve for all potential and estimated credit losses on loans, leases and unfunded commitments. The ACL on loans totaled $43.0 million as of June 30, 2025, $43.6 million as of December 31, 2024, and $42.3 million as of June 30, 2024. Our ACL on loans to total loans was 1.08% as of June 30, 2025, 1.10% as of December 31, 2024, and 1.06% as of June 30, 2024. See Item 7 – Critical Accounting Estimates in the Management Discussion and Analysis in our 2024 Annual Report in Form 10-K for discussion of our ACL methodology on loans. Allocations of the ACL may be made for specific loans, but the entire allowance is available for any loan that, in our judgment, should be charged-off.

Below is a reconciliation of the activity in the allowance for credit losses on loans for the periods indicated (dollars in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​ | Six Months Ended | ​
​ | June 30, | ​ | March 31, | ​ | June 30, | ​ | June 30, | ​ | June 30, | ​
​ | 2025 | ​ | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2024 | ​
Allowance at beginning of period | $ | 41,551 | ​ | ​ | $ | 43,619 | ​ | ​ | $ | 44,113 | ​ | ​ | $ | 43,619 | ​ | ​ | $ | 44,264 | ​ | ​
Charge–offs: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | 1,125 | ​ | ​ | ​ | 3,446 | ​ | ​ | ​ | 3 | ​ | ​ | ​ | 4,571 | ​ | ​ | ​ | 18 | ​ | ​
Leases | ​ | - | ​ | ​ | ​ | 107 | ​ | ​ | ​ | 81 | ​ | ​ | ​ | 107 | ​ | ​ | ​ | 81 | ​ | ​
Commercial real estate – investor | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | 4,580 | ​ | ​ | ​ | - | ​ | ​ | ​ | 4,596 | ​ | ​
Commercial real estate – owner occupied | ​ | - | ​ | ​ | ​ | 47 | ​ | ​ | ​ | 1,281 | ​ | ​ | ​ | 47 | ​ | ​ | ​ | 5,168 | ​ | ​
Construction | ​ | 13 | ​ | ​ | ​ | 821 | ​ | ​ | ​ | - | ​ | ​ | ​ | 834 | ​ | ​ | ​ | - | ​ | ​
Residential real estate – investor | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​
Residential real estate – owner occupied | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​
Multifamily | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​
HELOC | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​
Other 1 | ​ | 94 | ​ | ​ | ​ | 108 | ​ | ​ | ​ | 66 | ​ | ​ | ​ | 202 | ​ | ​ | ​ | 136 | ​ | ​
Total charge–offs | ​ | 1,232 | ​ | ​ | ​ | 4,529 | ​ | ​ | ​ | 6,011 | ​ | ​ | ​ | 5,761 | ​ | ​ | ​ | 9,999 | ​ | ​
Recoveries: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | 32 | ​ | ​ | ​ | 32 | ​ | ​ | ​ | 22 | ​ | ​ | ​ | 64 | ​ | ​ | ​ | 95 | ​ | ​
Leases | ​ | 3 | ​ | ​ | ​ | 14 | ​ | ​ | ​ | - | ​ | ​ | ​ | 17 | ​ | ​ | ​ | 40 | ​ | ​
Commercial real estate – investor | ​ | 14 | ​ | ​ | ​ | 14 | ​ | ​ | ​ | 20 | ​ | ​ | ​ | 28 | ​ | ​ | ​ | 103 | ​ | ​
Commercial real estate – owner occupied | ​ | 1 | ​ | ​ | ​ | 8 | ​ | ​ | ​ | 119 | ​ | ​ | ​ | 9 | ​ | ​ | ​ | 138 | ​ | ​
Construction | ​ | 350 | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | 350 | ​ | ​ | ​ | - | ​ | ​
Residential real estate – investor | ​ | 2 | ​ | ​ | ​ | 2 | ​ | ​ | ​ | 3 | ​ | ​ | ​ | 4 | ​ | ​ | ​ | 5 | ​ | ​
Residential real estate – owner occupied | ​ | 8 | ​ | ​ | ​ | 30 | ​ | ​ | ​ | 9 | ​ | ​ | ​ | 38 | ​ | ​ | ​ | 17 | ​ | ​
Multifamily | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​ | ​ | - | ​ | ​
HELOC | ​ | 10 | ​ | ​ | ​ | 12 | ​ | ​ | ​ | 15 | ​ | ​ | ​ | 22 | ​ | ​ | ​ | 32 | ​ | ​
Other 1 | ​ | 27 | ​ | ​ | ​ | 64 | ​ | ​ | ​ | 29 | ​ | ​ | ​ | 91 | ​ | ​ | ​ | 80 | ​ | ​
Total recoveries | ​ | 447 | ​ | ​ | ​ | 176 | ​ | ​ | ​ | 217 | ​ | ​ | ​ | 623 | ​ | ​ | ​ | 510 | ​ | ​
Net charge-offs | ​ | 785 | ​ | ​ | ​ | 4,353 | ​ | ​ | ​ | 5,794 | ​ | ​ | ​ | 5,138 | ​ | ​ | ​ | 9,489 | ​ | ​
Provision for credit losses on loans 2 | ​ | 2,224 | ​ | ​ | ​ | 2,285 | ​ | ​ | ​ | 3,950 | ​ | ​ | ​ | 4,509 | ​ | ​ | ​ | 7,494 | ​ | ​
Allowance at end of period | $ | 42,990 | ​ | ​ | $ | 41,551 | ​ | ​ | $ | 42,269 | ​ | ​ | $ | 42,990 | ​ | ​ | $ | 42,269 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average total loans (exclusive of loans held–for–sale) | $ | 3,958,330 | ​ | ​ | $ | 3,957,730 | ​ | ​ | $ | 3,957,454 | ​ | ​ | $ | 3,958,032 | ​ | ​ | $ | 3,988,403 | ​ | ​
Net charge–offs to average loans | ​ | 0.08 | % | ​ | ​ | 0.45 | % | ​ | ​ | 0.59 | % | ​ | ​ | 0.26 | % | ​ | ​ | 0.48 | % | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

1 The “Other” segment includes consumer loans and overdrafts.

2 Amount does not include the provision for unfunded commitment liability.

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The coverage ratio of the ACL on loans to nonperforming loans was 133.3% as of June 30, 2025, which was an increase from the coverage ratio of 119.4% as of March 31, 2025, and an increase from 90.2% as of June 30, 2024. Net charge-offs to average loans have remained relatively stable over the past year, at 0.08% for the quarter ended June 30, 2025, 0.45% for the quarter ended March 31, 2025, and 0.59% for the quarter ended June 30, 2024.

​

In management’s judgment, an adequate ACL has been established to encompass the current lifetime expected credit losses at June 30, 2025, as well as general changes in lending policy, procedures and staffing, and other external factors. However, there can be no assurance that actual losses will not exceed the estimated amounts in the future, based on unforeseen economic events, changes in business climates and the condition of collateral at the time of default and repossession. Continued volatility in the economic environment stemming from the impacts of and response to inflation, tariffs, potential recession, and the war in Ukraine and the conflict in the Middle East, and the associated effects on our customers, or other factors, such as changes in business climates and the condition of collateral at the time of default or repossession, may revise our current expectations of future credit losses in future reporting periods.

​

Other Real Estate Owned

​

As of June 30, 2025, OREO totaled $6.5 million, reflecting a decrease of $15.1 million from $21.6 million at December 31, 2024, and a decrease of $434,000 from $6.9 million at June 30, 2024. There were two property sales totaling $1.2 million during the second quarter of 2025. Valuation write-downs of $157,000 were recorded related to adjustments for updated appraisals on properties held. Valuation write-downs totaling $1.8 million occurred in the fourth quarter of 2024 and there were no valuation adjustments in the second quarter of 2024.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
OREO | Three Months Ended | ​ | Percent Change From
(Dollars in thousands) | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ | 2025 | ​ | 2024 | ​ | 2024 | ​ | 2024 | ​ | 2024
Balance at beginning of period | $ | 2,878 | ​ | $ | 8,202 | ​ | $ | 5,123 | ​ | (64.9) | ​ | ​ | (43.8) | ​
Property additions, net of transfer adjustments | ​ | 4,989 | ​ | ​ | 16,441 | ​ | ​ | 3,388 | ​ | (69.7) | ​ | ​ | 47.3 | ​
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from property disposals, net of participation purchase and of gains/losses | ​ | 1,224 | ​ | ​ | 1,254 | ​ | ​ | 1,591 | ​ | (2.4) | ​ | ​ | (23.1) | ​
Period valuation adjustments | ​ | 157 | ​ | ​ | 1,772 | ​ | ​ | - | ​ | (91.1) | ​ | ​ | 100.0 | ​
Balance at end of period | $ | 6,486 | ​ | $ | 21,617 | ​ | $ | 6,920 | ​ | (70.0) | ​ | ​ | (6.3) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

In management’s judgment, the property valuation allowance as established presents OREO at current estimates of fair value less estimated costs to sell; however, there can be no assurance that additional losses will not be incurred on disposals or upon updates to valuations in the future. These valuations are reversed when the property is sold.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
OREO Properties by Type | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | June 30, 2025 | ​ | December 31, 2024 | ​ | June 30, 2024
​ | ​ | Amount | ​ | % of Total | ​ | ​ | Amount | ​ | % of Total | ​ | ​ | Amount | ​ | % of Total
Vacant land | $ | - | ​ | - | % | ​ | $ | 197 | ​ | 1 | % | ​ | $ | 197 | ​ | 3 | %
Commercial property | ​ | 6,486 | ​ | 100 | ​ | ​ | ​ | 21,420 | ​ | 99 | ​ | ​ | ​ | 6,723 | ​ | 97 | ​
Total other real estate owned | $ | 6,486 | ​ | 100 | % | ​ | $ | 21,617 | ​ | 100 | % | ​ | $ | 6,920 | ​ | 100 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

​

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Deposits and Borrowings

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30, 2025
Deposits | As of | ​ | Percent Change From
(Dollars in thousands) | June 30, | ​ | December 31, | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ | 2025 | ​ | 2024 | ​ | 2024 | ​ | 2024 |  | 2024
Noninterest bearing demand | $ | 1,704,083 | ​ | $ | 1,704,920 | ​ | $ | 1,728,487 | ​ | (0.0) | ​ | (1.4)
Savings | ​ | 929,424 | ​ | ​ | 932,201 | ​ | ​ | 908,826 | ​ | (0.3) | ​ | 2.3
NOW accounts | ​ | 640,607 | ​ | ​ | 621,434 | ​ | ​ | 557,469 | ​ | 3.1 | ​ | 14.9
Money market accounts | ​ | 830,204 | ​ | ​ | 761,499 | ​ | ​ | 695,131 | ​ | 9.0 | ​ | 19.4
Certificates of deposit of less than $100,000 | ​ | 324,571 | ​ | ​ | 352,526 | ​ | ​ | 304,195 | ​ | (7.9) | ​ | 6.7
Certificates of deposit of $100,000 through $250,000 | ​ | 241,774 | ​ | ​ | 270,837 | ​ | ​ | 223,137 | ​ | (10.7) | ​ | 8.4
Certificates of deposit of more than $250,000 | ​ | 127,776 | ​ | ​ | 125,314 | ​ | ​ | 104,483 | ​ | 2.0 | ​ | 22.3
Total deposits | $ | 4,798,439 | ​ | $ | 4,768,731 | ​ | $ | 4,521,728 | ​ | 0.6 | ​ | 6.1

​

Total deposits were $4.80 billion at June 30, 2025, which reflects a $29.7 million increase from total deposits of $4.77 billion at December 31, 2024, and an increase of $276.7 million from total deposits of $4.52 billion at June 30, 2024. The increase in deposits at June 30, 2025, compared to December 31, 2024, was primarily due to increases in NOW accounts of $19.2 million and money market accounts of $68.7 million. These increases were partially offset by a decrease of $54.6 million in time deposits. The increase in deposits at June 30, 2025, compared to June 30, 2024, stemmed from both the FRME branch acquisition and legacy deposit account seasonal increases, and was primarily related to increases in savings accounts of $20.6 million, NOW accounts of $83.1 million, money market accounts of $135.1 million, and time deposits of $62.3 million, partially offset by a decrease in noninterest bearing deposits of $24.4 million. Total quarterly average deposits increased $274.0 million, or 6.0%, in the year over year period, driven by an increase in average money market accounts of $141.6 million, time deposits of $85.2 million, and NOW accounts of $82.8 million, which was partially offset by a decrease in average noninterest bearing deposits of $40.3 million. The overall increase in quarterly average deposits for the year over year period was primarily due to the acquisition of the FRME branches.

​

The following table presents estimated insured and uninsured deposits at June 30, 2025, and December 31, 2024, by deposit type, as well as the weighted average rates for each year to date ending period.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | June 30, 2025 | ​ | ​ | December 31, 2024
​ | Total Deposits | ​ | Insured Deposits | ​ | Uninsured Deposits | ​ | Average Rate Paid | ​ | Total Deposits | ​ | Insured Deposits | ​ | Uninsured Deposits | ​ | Average Rate Paid
Noninterest bearing demand | $ | 1,704,083 | ​ | $ | 1,106,864 | ​ | $ | 597,219 | ​ | - | % | ​ | $ | 1,704,920 | ​ | $ | 1,128,877 | ​ | $ | 576,043 | ​ | - | %
Savings | ​ | 929,424 | ​ | ​ | 868,062 | ​ | ​ | 61,362 | ​ | 0.41 | ​ | ​ | ​ | 932,201 | ​ | ​ | 873,668 | ​ | ​ | 58,533 | ​ | 0.34 | ​
NOW accounts | ​ | 640,607 | ​ | ​ | 457,681 | ​ | ​ | 182,926 | ​ | 0.41 | ​ | ​ | ​ | 621,434 | ​ | ​ | 468,781 | ​ | ​ | 152,653 | ​ | 0.50 | ​
Money market accounts | ​ | 830,204 | ​ | ​ | 513,025 | ​ | ​ | 317,179 | ​ | 1.80 | ​ | ​ | ​ | 761,499 | ​ | ​ | 496,293 | ​ | ​ | 265,206 | ​ | 1.70 | ​
Time deposits | ​ | 694,121 | ​ | ​ | 580,590 | ​ | ​ | 113,531 | ​ | 2.65 | ​ | ​ | ​ | 748,677 | ​ | ​ | 638,140 | ​ | ​ | 110,537 | ​ | 3.21 | ​
Total | $ | 4,798,439 | ​ | $ | 3,526,222 | ​ | $ | 1,272,217 | ​ | 0.83 | % | ​ | $ | 4,768,731 | ​ | $ | 3,605,759 | ​ | $ | 1,162,972 | ​ | 0.83 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Collateralized public funds | $ | 240,893 | ​ | $ | 16,839 | ​ | $ | 224,054 | ​ | ​ | ​ | ​ | $ | 217,358 | ​ | $ | 16,557 | ​ | $ | 200,801 | ​ | ​ | ​

​

Deposits increased 0.6% for the six months ended June 30, 2025, compared to December 31, 2024, due to new acquired deposits and seasonal inflow from Public Funds. Time deposit maturities continue to migrate into market priced money market accounts. Insured deposits are mildly lower due to an increase of higher balance commercial accounts.

​

In addition to deposits, we used other liquidity sources for our funding needs in all periods presented, such as repurchase agreements and other short-term borrowings with the FHLBC. Securities sold under repurchase agreements totaled $47.3 million at June 30, 2025, a $10.6 million, or 28.9% increase from $36.7 million at December 31, 2024, and an increase of $710,000, or 1.5%, from June 30, 2024. There were no outstanding short-term FHLBC borrowings as of June 30, 2025, and the outstanding balance of our short-term FHLBC borrowings was $20.0 million as of December 31, 2024, and $330.0 million as of June 30, 2024. The large decrease in short-term FHLB advances is due to an influx of cash resulting from the acquisition of the five FRME branches on December 6, 2024, which allowed us to utilize the purchased deposits for lower cost funding.

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We are also indebted on $25.8 million of junior subordinated debentures, net of deferred issuance costs, as of June 30, 2025, which are related to the trust preferred securities issued by its statutory trust subsidiary, Old Second Capital Trust II (“Trust II”). The Trust II issuance converted from fixed to floating rate at three month LIBOR, which is now three month Term SOFR, plus 150 basis points beginning June 15, 2017. Upon conversion to a floating rate, we initiated a cash flow hedge which resulted in net year to date interest rate paid on this debt of 4.48% as of June 30, 2025, as compared to 6.77%, which was the rate paid during the period prior to the June 15, 2017, rate reset.

​

In the second quarter of 2021, we entered into Subordinated Note Purchase Agreements with certain qualified institutional buyers pursuant to which we issued $60.0 million in aggregate principal amount of our 3.50% Fixed-to-Floating Rate Subordinated Notes due April 15, 2031 (the “Notes”). We sold the Notes to eligible purchasers in a private offering, and the proceeds of this issuance were used for general corporate purposes. The Notes bear interest at a fixed annual rate of 3.50% through April 14, 2026, payable semi-annually in arrears. As of April 15, 2026, forward, the interest rate on the Notes will generally reset quarterly to a rate equal to three-month Term SOFR (as defined by the Note) plus 273 basis points, payable quarterly in arrears. The Notes have a stated maturity of April 15, 2031, and are redeemable, in whole are in part, on April 15, 2026, or any interest payment date thereafter, and at any time upon the occurrence of certain events. As of June 30, 2025, we had $59.5 million of subordinated debentures outstanding, net of deferred issuance costs.

​

​

Capital

​

As of June 30, 2025, total stockholders’ equity was $718.6 million, which was an increase of $47.6 million from $671.0 million as of December 31, 2024. This increase was largely attributable to net income of $41.7 million in the first six months of 2025, partially offset by $5.4 million of dividends paid to our common stockholders. In addition, total stockholders’ equity as of June 30, 2025, increased over December 31, 2024, due to a reduction in unrealized net losses on available-for-sale securities and swaps, which contributed to the overall decrease in accumulated other comprehensive loss of $10.3 million in the first six months of 2025, due to changes in market interest rates. Total stockholders’ equity as of June 30, 2025, increased $99.3 million compared to June 30, 2024, primarily due to net income year over year and the decrease in accumulated other comprehensive loss of $23.3 million year over year.

​

The following table shows the regulatory capital ratios and the current well capitalized regulatory requirements for the Company and the Bank as of the dates indicated:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Minimum Capital | ​ | Well Capitalized | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Adequacy with | ​ | Under Prompt | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Capital Conservation | ​ | ​ | Corrective Action | ​ | June 30, | ​ | December 31, | ​ | June 30,
​ | ​ | Buffer, if applicable1 | ​ | Provisions2 | ​ | 2025 | ​ | 2024 | ​ | 2024
The Company | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital ratio | ​ | 7.00 | % | ​ | N/A | ​ | ​ | 13.77 | % | ​ | 12.82 | % | ​ | 12.41 | %
Total risk-based capital ratio | ​ | 10.50 | ​ | ​ | N/A | ​ | ​ | 16.55 | ​ | ​ | 15.54 | ​ | ​ | 15.12 | ​
Tier 1 risk-based capital ratio | ​ | 8.50 | ​ | ​ | N/A | ​ | ​ | 14.31 | ​ | ​ | 13.34 | ​ | ​ | 12.94 | ​
Tier 1 leverage ratio | ​ | 4.00 | ​ | ​ | N/A | ​ | ​ | 11.83 | ​ | ​ | 11.30 | ​ | ​ | 10.96 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The Bank | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital ratio | ​ | 7.00 | % | ​ | 6.50 | % | ​ | 14.02 | % | ​ | 12.89 | % | ​ | 13.50 | %
Total risk-based capital ratio | ​ | 10.50 | ​ | ​ | 10.00 | ​ | ​ | 14.99 | ​ | ​ | 13.82 | ​ | ​ | 14.42 | ​
Tier 1 risk-based capital ratio | ​ | 8.50 | ​ | ​ | 8.00 | ​ | ​ | 14.02 | ​ | ​ | 12.89 | ​ | ​ | 13.50 | ​
Tier 1 leverage ratio | ​ | 4.00 | ​ | ​ | 5.00 | ​ | ​ | 11.59 | ​ | ​ | 10.90 | ​ | ​ | 11.43 | ​

​

1 Amounts are shown inclusive of a capital conservation buffer of 2.50%.

2 The prompt corrective action provisions are only applicable at the Bank level.

​

N/A - Not applicable

​

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As of June 30, 2025, the Company, on a consolidated basis, exceeded the minimum capital ratios to be deemed “well capitalized” and met the capital conservation buffer requirements. In addition to the above regulatory ratios, our GAAP common equity to total assets ratio, which is used as a performance measurement for capital analysis and peer comparisons, increased from 11.88% at December 31, 2024, to 12.61% at June 30, 2025. Our GAAP tangible common equity to tangible assets ratio was 10.83% at June 30, 2025, compared to 10.04% as of December 31, 2024. Our non-GAAP tangible common equity to tangible assets ratio, which management also considers a valuable performance measurement for capital analysis, increased from 10.11% at December 31, 2024, to 10.90% at June 30, 2025, primarily due to an increase in tangible common equity at a faster pace than tangible assets in the first six months of 2025. The increase in tangible common equity from December 31, 2024, to June 30, 2025, was primarily due to an increase in retained earnings of $36.3 million and a reduction of $10.3 million in unrealized losses in AOCI.

​

​

Reconciliation of Tangible Common Equity to Tangible Assets Ratio Non-GAAP Measure

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | June 30, 2025 | ​ | ​ | December 31, 2024 | ​
Tangible common equity | GAAP | ​ | ​ | Non-GAAP | ​ | ​ | GAAP | ​ | ​ | Non-GAAP | ​
(Dollars in thousands) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Equity | $ | 718,649 | ​ | ​ | $ | 718,649 | ​ | ​ | $ | 671,034 | ​ | ​ | $ | 671,034 | ​
Less: Goodwill and intangible assets | ​ | 113,204 | ​ | ​ | ​ | 113,204 | ​ | ​ | ​ | 115,291 | ​ | ​ | ​ | 115,291 | ​
Add: Limitation of exclusion of core deposit intangible (80%) | ​ | N/A | ​ | ​ | ​ | 3,994 | ​ | ​ | ​ | N/A | ​ | ​ | ​ | 4,406 | ​
Adjusted goodwill and intangible assets | ​ | 113,204 | ​ | ​ | ​ | 109,210 | ​ | ​ | ​ | 115,291 | ​ | ​ | ​ | 110,885 | ​
Tangible common equity | $ | 605,445 | ​ | ​ | $ | 609,439 | ​ | ​ | $ | 555,743 | ​ | ​ | $ | 560,149 | ​
Tangible assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total assets | $ | 5,701,294 | ​ | ​ | $ | 5,701,294 | ​ | ​ | $ | 5,649,377 | ​ | ​ | $ | 5,649,377 | ​
Less: Adjusted goodwill and intangible assets | ​ | 113,204 | ​ | ​ | ​ | 109,210 | ​ | ​ | ​ | 115,291 | ​ | ​ | ​ | 110,885 | ​
Tangible assets | $ | 5,588,090 | ​ | ​ | $ | 5,592,084 | ​ | ​ | $ | 5,534,086 | ​ | ​ | $ | 5,538,492 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity to total assets | ​ | 12.61 | % | ​ | ​ | 12.61 | % | ​ | ​ | 11.88 | % | ​ | ​ | 11.88 | %
Tangible common equity to tangible assets | ​ | 10.83 | % | ​ | ​ | 10.90 | % | ​ | ​ | 10.04 | % | ​ | ​ | 10.11 | %

​

N/A - Not applicable

​

The non-GAAP intangible asset exclusion reflects the 80% core deposit limitation per Basel III guidelines within risk-based capital calculations, and is useful for us when reviewing risk-based capital ratios and equity performance metrics.

​

​

Liquidity

​

Liquidity is our ability to fund operations, to meet depositor withdrawals, to provide for customers’ credit needs, and to meet maturing obligations and existing commitments. Our liquidity principally depends on our cash flows from operating activities, investment in and maturity of assets, changes in balances of deposits and borrowings, and our ability to borrow funds. Through the second quarter of 2025, we experienced an increase in both loans and deposits. We managed the change in our funding through a reduction in average borrowings from the FHLBC through June 30, 2025, compared to the prior year like period. We seek to ensure our funding needs are met by maintaining a level of liquidity through asset and liability management. We monitor our borrowing capacity at the FHLBC as part of our liquidity management process as supervised by our Asset and Liability Committee (“ALCO”) and reviewed by our Board of Directors. In addition, our senior management team monitors cash balances daily to ensure we have adequate liquidity to meet our operational and financing needs. As of June 30, 2025, our cash on hand liquidity totaled $141.8 million, an increase of $42.4 million over cash balances held as of December 31, 2024.

​

Net cash inflows from operating activities were $42.1 million during the first six months of 2025, compared with net cash inflows of $59.0 million in the same period of 2024. Funds used to originate loans held-for-sale, net of proceeds from sales of loans held-for-sale, resulted in outflows for both the first six months of 2025 and 2024. Interest paid, net of interest received, combined with changes in other assets and liabilities were a source of outflows for the six months ended June 30, 2025, and a source of inflows for the like period of 2024. The management of investing and financing activities, as well as market conditions, determines the level and the stability of net interest cash flows. Management’s policy is to mitigate the impact of changes in market interest rates to the extent possible, as part of the balance sheet management process.

​

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Net cash outflows from investing activities were $13.4 million in the six months ended June 30, 2025, compared to net cash inflows of $70.8 million in the same period in 2024. In the first six months of 2025, securities transactions accounted for net outflows of $3.0 million, and the principal change on loans accounted for net outflows of $27.3 million. In the first six months of 2024, securities transactions accounted for net inflows of $19.2 million, and principal on loans funded, net of paydowns, accounted for net inflows of $54.0 million.

​

Net cash inflows from financing activities in the six months ended June 30, 2025, were $13.8 million, compared with net cash outflows of $109.1 million in the six months ended June 30, 2024. Net deposit inflows in the first six months of 2025 were $30.1 million compared to net deposit outflows of $48.9 million in the first six months of 2024. Other short-term borrowings had $20.0 million of net cash outflows in the first six months of 2025, compared to net cash outflows of $75.0 million for other short-term borrowings in the first six months of 2024. Changes in securities sold under repurchase agreements accounted for inflows of $10.6 million and inflows of $20.1 million for the six months ended June 30, 2025 and 2024, respectively. Dividends paid on our common stock totaled $5.4 million for the six months ended June 30, 2025, and $4.5 million for the six months ended June 30, 2024. The purchase of treasury stock in the first six months of 2025 due to shares acquired with equity award vestings resulted in outflows of $1.5 million, compared to cash outflows of $791,000 in the first six months of 2024 related to shares acquired from equity award vestings.

​

Cash and cash equivalents for the six months ended June 30, 2025, totaled $141.8 million, as compared to $99.3 million as of December 31, 2024, and $120.9 million as of June 30, 2024. The increase in cash and cash equivalents for the six months ended June 30, 2025, as compared to year end 2024 and June 30, 2024, was primarily attributable to the increase in customer deposits and securities sold under repurchase agreements, partially offset by the increase in our loan and securities portfolios during the first six months of 2025. In addition to cash and cash equivalents on hand or held as deposits with other financial institutions, we rely on funding sources from customer deposits, cash flows from securities available-for-sale and loans, and a line of credit with the FHLBC to meet potential liquidity needs. These sources of liquidity are immediately available to satisfy any funding requirements due to depositor or borrower demands through the ordinary course of our business. Additional sources of funding available include a $30.0 million undrawn line of credit held by the Company with a third party financial institution, as well as unpledged securities available-for-sale.

​

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Item 3. Quantitative and Qualitative Disclosures about Market Risk

​

Interest Rate Risk

​

We are subject to interest rate risk from changes on assets (loans and securities), liabilities (customer deposits and borrowed funds) and off-balance sheet derivatives (interest rate swaps). Fluctuations in interest rates may have a material impact to fair market values of our financial instruments, cash flows, and net interest income. Like most financial institutions, we have an exposure to changes in both short-term and long-term interest rates. We believe a financial institution’s ability to effectively tune its interest rate risk profile and strategically position its balance sheet through rate cycles helps sustain the financial performance of the institution.

​

The Federal Reserve Board (“FRB”) continues to maintain the Federal Funds (“FF”) target rate within the range of 4.25% - 4.50%. FRB officials remain divided—some support holding the current rate, while others view the recently enacted tariffs as a one-time cost with limited long-term impact. The current forward curve reflects expectations for two rate cuts in 2025, consistent with the FRB’s dot plot.

​

We manage interest rate risk within guidelines established by the asset liability policy which are intended to limit the amount of rate exposure. In practice, we seek to manage our interest rate risk exposure within our guidelines so that such exposure does not pose a material risk to our future earnings. We manage various market risks in the normal course of our operations, including credit, liquidity risk, and interest rate risk. Other types of market risk, such as foreign currency exchange risk and commodity price risk, do not arise in the normal course of our business activities and operations. In addition, since we do not hold a trading portfolio, we are not exposed to significant market risk from trading activities. Our interest rate risk exposures at June 30, 2025, and December 31, 2024, are outlined in the table below.

​

Our net income can be significantly influenced by a variety of external factors, including: overall economic conditions, policies and actions of regulatory authorities, the amounts of and rates at which assets and liabilities reprice, variances in prepayment of loans and securities other than those that are assumed, early withdrawal of deposits, exercise of call options on borrowings or securities, competition, a general rise or decline in interest rates, changes in the slope of the yield-curve, changes in historical relationships between indices (such as SOFR and Prime), and balance sheet growth or contraction. Our asset-liability committee seeks to manage interest rate risk under a variety of rate environments by structuring our on-balance sheet and off-balance sheet positions, which includes interest rate swap derivatives as discussed in Note 19 of our consolidated financial statements found in our Annual Report on Form 10-K for the year ended December 31, 2024. We seek to monitor and manage interest rate risk within approved policy guidelines and limits. Asset and liability modeling and tracking is performed and presented to the asset-liability committee and the Board of Directors no less than quarterly. Such presentations discuss our current and historical interest rate risk posture, shifts in the balance sheet composition, and the impact of interest rate movements on earnings and equity. Our current balance sheet is a moderately asset sensitive profile, our variable rate assets reprice faster than our longer duration, low beta deposit base. The market events of failed liquidity management at other banks in 2023 have been discussed and reviewed by the asset-liability committee. The committee concluded that we possess a strong liquidity profile and no new liquidity risks were identified. Prudently, we added new measures to assess liquidity risk and enhanced our internal reports to segment deposits by insured, uninsured, collateralized deposits, and we monitor the bank’s funding sources and uses on a regular basis.

​

We also have a risk committee, chaired by our Chief Risk Officer, which reports no less than quarterly to senior management as well as our Board of Directors regarding compliance with risk tolerance limits, key risk factor changes, both internally and externally, due to portfolio changes as well as market conditions. Our enterprise risk management framework is governed by this committee, with input being provided by line of business managers, senior management and the Board.

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We use simulation analysis to quantify the impact of various rate scenarios on our net interest income. Specific cash flows, repricing characteristics, and embedded options of the assets and liabilities held by us are incorporated into the simulation model. Earnings at risk are calculated by comparing the net interest income of a stable interest rate environment to the net interest income of a different interest rate environment in order to determine the percentage change. As of June 30, 2025, our net interest income profile remained sensitive to earnings gains (in both dollars and percentage) should market interest rates rise. Comparatively, we have a slightly more sensitive profile relative to December 31, 2024, should interest rates rise. This reflects a continued build of our cash balance derived from earnings and return of principal in the form of amortizations, maturities, calls, and prepayments.

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The following table summarizes the effect on annual income before income taxes based upon an immediate increase or decrease in interest rates of 0.5%, 1.0%, and 2.0%, with no change in the slope of the yield curve.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Analysis of Net Interest Income Sensitivity
​ | ​ | Immediate Changes in Rates
(Dollars in thousands) | ​ |  | (2.0) | % | ​ |  | (1.0) | % |  |  | (0.5) | % |  |  | 0.5 | % |  |  | 1.0 | % |  |  | 2.0 | %
June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Dollar change | ​ | $ | (38,313) | ​ | ​ | $ | (19,313) | ​ | ​ | $ | (9,669) | ​ | ​ | $ | 9,407 | ​ | ​ | $ | 18,942 | ​ | ​ | $ | 35,733 | ​
Percent change | ​ | ​ | (14.4) | % | ​ | ​ | (7.3) | % | ​ | ​ | (3.6) | % | ​ | ​ | 3.5 | % | ​ | ​ | 7.1 | % | ​ | ​ | 13.4 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Dollar change | ​ | $ | (38,905) | ​ | ​ | $ | (19,660) | ​ | ​ | $ | (9,740) | ​ | ​ | $ | 9,513 | ​ | ​ | $ | 19,168 | ​ | ​ | $ | 35,813 | ​
Percent change | ​ | ​ | (15.0) | % | ​ | ​ | (7.6) | % | ​ | ​ | (3.7) | % | ​ | ​ | 3.7 | % | ​ | ​ | 7.4 | % | ​ | ​ | 13.8 | %

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The amounts and assumptions used in the simulation model should not be viewed as indicative of expected actual results. Actual results will differ from simulated results due to timing, magnitude, balance sheet composition and frequency of interest rate changes as well as changes in market conditions and management strategies. The above results do not take into account any management action to mitigate potential risk.

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Effects of Inflation

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In management’s opinion, changes in interest rates affect our financial condition to a far greater degree than changes in the inflation rate; we monitor both. The annual U.S. inflation rate for June 2025 trended up to 2.7% versus a softer reading last quarter of 2.4%, Core CPI inched up to 3.0%. With the unprecedented enactment of tariffs across U.S. trade partners, management believes this will eventually flow through, reversing the course of lower inflation. The downside risks of high inflation put upwards pressure on our expenses, which could impact our profits. Furthermore, higher costs of living may weaken the financial condition of our borrowers which could affect our credit profile. Inflation at the levels currently experienced has a minimal impact to our financial results.

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Item 4. Controls and Procedures

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Evaluation of Disclosure Controls and Procedures

​

The Chief Executive Officer and Chief Financial Officer have evaluated the effectiveness of the design and operation of the Company’s disclosure controls and procedures, as defined in Rule 13a-15(e) promulgated under the Securities and Exchange Act of 1934, as amended, as of June 30, 2025. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that as of June 30, 2025, the Company’s internal controls were effective to ensure that information required to be disclosed by the Company in reports that it files or submits under the Securities and Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods specified.

​

There were no changes in the Company’s internal controls over financial reporting during the quarter ended June 30, 2025, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

​

The design of any system of controls and procedures is based in part upon certain assumptions about the likelihood of future events. There can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.

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PART II - OTHER INFORMATION

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Item 1. Legal Proceedings

​

The Company and its subsidiaries, from time to time, are involved in collection suits in the ordinary course of business against its debtors and are defendants in legal actions arising from normal business activities. Management, after consultation with legal counsel, believes that the ultimate liabilities, if any, resulting from these actions will not have a material adverse effect on the financial position of the Bank or on the consolidated financial position of the Company.

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Item 1.A. Risk Factors

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Investing in shares of our common stock involves certain risks, including those identified and described in Item 1A of our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as well as cautionary statements contained in this Quarterly Report, on Form 10-Q, including those under the caption “Cautionary Note Regarding Forward-Looking Statements.”

​

There have been no material changes to the risk factors previously disclosed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

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Stock Repurchases

​

In December 2024, our board of directors authorized the repurchase of up to 2,234,896 shares of our common stock (the “Repurchase Program”). The Company received notice of non-objection in December 2024 from the Federal Reserve Bank of Chicago for the Repurchase Program. Under the Repurchase Program, repurchases may be made through December 31, 2025, will not exceed an aggregate value of $39.1 million. We may make repurchases under the Repurchase Program from time to time through open market purchases, trading plans established in accordance with SEC rules, privately negotiated transactions, or by other means.

​

The actual means and timing of any repurchases, quantity of purchased shares and prices will be, subject to certain limitations, at the discretion of management and will depend on a number of factors, including, without limitation, market prices of our common stock, general market and economic conditions, and applicable legal and regulatory requirements. Repurchases under the Repurchase Program may be initiated, discontinued, suspended or restarted at any time provided that repurchases under the Repurchase Program after December 31, 2025, would require Federal Reserve non-objection or approval. We are not obligated to repurchase any shares under the Repurchase Program.

​

The following table presents our stock repurchases for the quarter ended June 30, 2025.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Total Number of | ​ | Maximum Number
​ | ​ | Total | ​ | ​ | ​ | ​ | Shares Purchased | ​ | of Shares that May
​ | ​ | Number of | ​ | ​ | Average | ​ | as Part of Publicly | ​ | Yet Be
​ | ​ | Shares | ​ | ​ | Price Paid | ​ | Announced Plans | ​ | Purchased Under
​ | ​ | Purchased (a) | ​ | ​ | per Share (b) | ​ | or Programs (c)1 | ​ | the Plans or Programs (d)
April 1, 2025 - April 30, 2025 | ​ | - | ​ | ​ | - | ​ | - | ​ | 2,234,896
May 1, 2025 - May 31, 2025 | ​ | - | ​ | ​ | - | ​ | - | ​ | 2,234,896
June 1, 2025 - June 30, 2025 | ​ | - | ​ | ​ | - | ​ | - | ​ | 2,234,896
Total | ​ | - | ​ | $ | - | ​ | - | ​ | 2,234,896
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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1 We announced our Repurchase Program, which will expire on December 31, 2025, unless further extended as described above, in our Current Report on Form 8-K filed on December 20, 2024, and 2,234,896 shares remained available for repurchase under the Repurchase Program as of June 30, 2025.

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Item 3. Defaults Upon Senior Securities

​

None.

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Item 4. Mine Safety Disclosures

​

Not applicable.

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Item 5. Other Information

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Trading Plans

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During the three months ended June 30, 2025, no director or “officer” of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

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Item 6. Exhibits

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Exhibits:

​ | ​
​ | ​
2.1 | Agreement and Plan of Merger between Old Second Bancorp, Inc. and Bancorp Financial, Inc. dated as of February 24, 2025 (incorporated by reference to Exhibit 2.1 of the Old Second Bancorp, Inc. Current Report on Form 8-K filed on February 25, 2025) +
​ | ​
31.1 | Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a).
​ | ​
31.2 | Certification of Chief Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a).
​ | ​
32.1 | Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
​ | ​
32.2 | Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
​ | ​
101 | Interactive data files pursuant to Rule 405 of Regulation S-T: (i) Consolidated Balance Sheets at June 30, 2025, and December 31, 2024; (ii) Consolidated Statements of Income for the three and six months ended June 30, 2025 and 2024; (iii) Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June 30, 2025 and 2024; (iv) Consolidated Statements of Cash Flows for the six months ended June 30, 2025 and 2024; (v) Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2025 and 2024; and (vi) Notes to Consolidated Financial Statements, tagged as blocks of text and in detail.
​ | ​
104 | Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).
​ | ​
​ | ​
​ | ​

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+ Schedules and similar attachments have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The registrant will furnish supplementally a copy of any omitted schedules or similar attachment to the SEC upon request.

​

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SIGNATURES

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Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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​ | ​ | ​ | ​
​ | OLD SECOND BANCORP, INC.
​ | ​
​ | ​
​ | BY: | /s/ James L. Eccher
​ | ​ | James L. Eccher
​ | ​ | Chairman, President and Chief Executive Officer
​ | ​ | (principal executive officer)
​ | ​
​ | ​
​ | BY: | /s/ Bradley S. Adams
​ | ​ | Bradley S. Adams
​ | ​ | Executive Vice President, Chief Operating Officer and Chief Financial Officer
​ | ​ | (principal financial and accounting officer)
​ | ​
​ | ​
DATE: August 7, 2025 | ​

​

​

​

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